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Problem with partition sdcard after fail flash

Hello,
That last night I wanted to flash a new ROM from 4.4 to 5.0.1.
I had some bugs, like my full SD card, therefore i installed nothing like apps or pictures .
So I try to re-flash the ROM again after a factory reset.
But, i can not reflash since it has wipe my SD card ..
So I managed to reconnect my phone and flash a recovery.
However, when I install a ROM (official google, or custom), it no longer detects my SD card
when the flash rom: E: unknown volume for path / sd-ext.
I try everything, I do not know how to repartition as originally my SD card.
I hope she is not dead as impossible to get out of my phone ...
I manage to mount the SD card, but still the sd-ext partition that does not exist ...
I just followed here: http://forum.xda-developers.com/goo...o-repairing-corrupted-data-partition-t2577447
everything works, but again, the sd-ext partition ..
I manage to get to the bootloader, recovery, I can flash a ROM anyway!
However, when I want to take a picture / install / sms .... I get an error "No SD card" or not avaialble space.
I need your help, since yesterday I have no phone ..
Best Regards,

sleakerz said:
Hello,
That last night I wanted to flash a new ROM from 4.4 to 5.0.1.
I had some bugs, like my full SD card, therefore i installed nothing like apps or pictures .
So I try to re-flash the ROM again after a factory reset.
But, i can not reflash since it has wipe my SD card ..
So I managed to reconnect my phone and flash a recovery.
However, when I install a ROM (official google, or custom), it no longer detects my SD card
when the flash rom: E: unknown volume for path / sd-ext.
I try everything, I do not know how to repartition as originally my SD card.
I hope she is not dead as impossible to get out of my phone ...
I manage to mount the SD card, but still the sd-ext partition that does not exist ...
I just followed here: http://forum.xda-developers.com/goo...o-repairing-corrupted-data-partition-t2577447
everything works, but again, the sd-ext partition ..
I manage to get to the bootloader, recovery, I can flash a ROM anyway!
However, when I want to take a picture / install / sms .... I get an error "No SD card" or not avaialble space.
I need your help, since yesterday I have no phone ..
Best Regards,
Click to expand...
Click to collapse
Easiest way to solve is just to flash a factory image - follow ALL the instructions on this page: https://developers.google.com/android/nexus/images
Have a read of RootSU's post about file system issues after updating - explains how and why this happens, and how to fix. I would just do the above though, just so you know you're totally back to stock.
http://forum.xda-developers.com/google-nexus-5/general/sdcard-problems-upgrading-android-t2938749

it looks run, I can now see my sd card, install applications ...
However, some problem:
- In aborescence I have : sdcard, then 0 / legacy / OBB
Is it the same for you? Is like this for 5.0?
- When flash: E unknown volume to path sd-ext. Unable to unmount or mount /system, but I was able to boot; and it seems to work ..
- Clean master does not detect anything (unnecessary file or anything ..) Why?
- What recovery do you recommend?
- In storage: Various weighs 5.68gb, but there is nothing on it, how to clean?

sleakerz said:
it looks run, I can now see my sd card, install applications ...
However, some problem:
- In aborescence I have : sdcard, then 0 / legacy / OBB
Is it the same for you? Is like this for 5.0?
- When flash: E unknown volume to path sd-ext. Unable to unmount or mount /system, but I was able to boot; and it seems to work ..
- Clean master does not detect anything (unnecessary file or anything ..) Why?
- What recovery do you recommend?
- In storage: Various weighs 5.68gb, but there is nothing on it, how to clean?
Click to expand...
Click to collapse
- go to general > stick roll-up and find my data loss/recovery thread it explains all the /sdcard quirks
- you don't have sd-ext, that's why. you can't mount /system if its already mounted
- who knows?
- TWRP
- again check my recovery /loss thread and also my "sdcard problems" thread in general. particularly the part about lost Nandroid backups
Your best bet is to read those threads, find any lost backups and wipe storage via TWRP

"you don't have sd-ext, that's why. you can't mount /system if its already mounted"
It is normal ? Or it's a problem ? How can i fix it ?
I don't have any Nandroid backup, mine didn't worked ..

sleakerz said:
"you don't have sd-ext, that's why. you can't mount /system if its already mounted"
It is normal ? Or it's a problem ? How can i fix it ?
I don't have any Nandroid backup, mine didn't worked ..
Click to expand...
Click to collapse
Its normal.
Please find and read those threads.

I'm french, and so i didn't understand all , i'm in which case ?
If i understand well, i just have to wipe "data" partition ?
As you say, i have sdcard\0\0\0
Which one i have to moove ?

sleakerz said:
I'm french, and so i didn't understand all , i'm in which case ?
If i understand well, i just have to wipe "data" partition ?
As you say, i have sdcard\0\0\0
Which one i have to moove ?
Click to expand...
Click to collapse
Go to /data/media/0. That's where everything should be. When you're in /data/media/0, you shouldn't see any more "0" folders. If you do, take everything out of those "0" folders and put it all in /data/media/0
So for example you should have your photos in /data/media/0/DCIM. If you have /data/media/0/0/0/0/DCIM, obviously that is wrong.
Sometimes its easiest to wipe everything a d start fresh so copy any data you want to keep to PC, then flash the 5.0.1 full factory image, wiping your device back to default completely.

I just did this, i flashed a full factory image this morning, it was the same ..
I made a factory, wipe a new ROm, always the same, i made everything, nothing work .
the sdcard is boring me ..
I don't know what to do ..

sleakerz said:
I just did this, i flashed a full factory image this morning, it was the same ..
I made a factory, wipe a new ROm, always the same, i made everything, nothing work .
the sdcard is boring me ..
I don't know what to do ..
Click to expand...
Click to collapse
It can't be the same if you flash the full factory image. Please explain the exact steps you took to flash full factory image.

I downloaded : hammerhead-lrx22c-factory-0f9eda1b.tgz
I unzipped , to get the flash-all.bat script (http://forum.xda-developers.com/google-nexus-5/general/tutorial-how-to-flash-factory-image-t2513701)
I make a factory reset
-- E : unknown volume for path [/sd-ext]
I launch the script : http://i.gyazo.com/177625d0c7f9ba60bc207e39536b0b31.png i've got this ..
What i can do now ?

sleakerz said:
I downloaded : hammerhead-lrx22c-factory-0f9eda1b.tgz
I unzipped , to get the flash-all.bat script (http://forum.xda-developers.com/google-nexus-5/general/tutorial-how-to-flash-factory-image-t2513701)
I make a factory reset
-- E : unknown volume for path [/sd-ext]
I launch the script : http://i.gyazo.com/177625d0c7f9ba60bc207e39536b0b31.png i've got this ..
What i can do now ?
Click to expand...
Click to collapse
Unpack all the .img files and do this
fastboot erase system
fastboot flash system system.img
fastboot erase userdata
fastboot flash userdata userdata.img
fastboot flash boot boot.img
Read general > sticky roll-up> adb and fastboot.... If you get stuck with that

fastboot flash bootloader C:/image-hammerhead-krt16m/bootloader.img
fastboot reboot-bootloader
fastboot flash radio C:/image-hammerhead-krt16m/radio.img
fastboot reboot-bootloader
fastboot flash system C:/image-hammerhead-krt16m/system.img
fastboot flash userdata C:/image-hammerhead-krt16m/userdata.img
(Note: this command will wipe your device (including /sdcard), EVEN if your bootloader is already unlocked.)
fastboot flash boot C:/image-hammerhead-krt16m/boot.img
fastboot flash recovery C:/image-hammerhead-krt16m/recovery.img
fastboot erase cache
And it's seems to work, like you can see : http://i.gyazo.com/f84948dd6d444a47b114437b8878a314.png
Now i have a factory image, what can i do to use a new ROM / get root and unlock bootloader (if it's not done ?)

sleakerz said:
fastboot flash bootloader C:/image-hammerhead-krt16m/bootloader.img
fastboot reboot-bootloader
fastboot flash radio C:/image-hammerhead-krt16m/radio.img
fastboot reboot-bootloader
fastboot flash system C:/image-hammerhead-krt16m/system.img
fastboot flash userdata C:/image-hammerhead-krt16m/userdata.img
(Note: this command will wipe your device (including /sdcard), EVEN if your bootloader is already unlocked.)
fastboot flash boot C:/image-hammerhead-krt16m/boot.img
fastboot flash recovery C:/image-hammerhead-krt16m/recovery.img
fastboot erase cache
And it's seems to work, like you can see : http://i.gyazo.com/f84948dd6d444a47b114437b8878a314.png
Now i have a factory image, what can i do to use a new ROM / get root and unlock bootloader (if it's not done ?)
Click to expand...
Click to collapse
You didn't do the commands I said. The erase was important
You would need to fastboot flash a custom recovery and either flash a custom ROM from that recovery or flash SuperSU from recovery depending if you want a new ROM or just root

i didn't do the command, but as you can see in the screen, just after "fastboot flash system C:/image-hammerhead-krt16m/system.img"
there is : "erasing system.. OKAY"
So i think it's good no ?

sleakerz said:
i didn't do the command, but as you can see in the screen, just after "fastboot flash system C:/image-hammerhead-krt16m/system.img"
there is : "erasing system.. OKAY"
So i think it's good no ?
Click to expand...
Click to collapse
I just wanted you to do it manually yourself, for userdata

Really thank for your help rootSU !
Now, everything works like a charm : )

sleakerz said:
Really thank for your help rootSU !
Now, everything works like a charm : )
Click to expand...
Click to collapse
Great news. Thanks for letting us know

No SD Card
Sorry if wrong thread but, my problem is:
If I'm in twrp it sees the sdcard and all things on it.
In system it doesn't see the things on the SD card.
Please don't return that I have to do a factory reflash.
If I try to download sth. It gives a toast "No Sd Card" .
I can't take it out because I've got a Nexus 4.
Pls. Help me.

Encryption unsuccessful coming my lenovo a6000 plus

Suddenly my mobile is switch off.after it showing a message like reset.once resetting click on button. but didn't reset. Coming screen lenovo startup image only. i am waiting 1 hour bud didn't reset my mobile.please help me my friends.

Encryption unsuccessful!!!
Hello,
I am new to this forum. I was working on my phone. Suddenly it get switched off. when I switched it on the screen says that "Encryption Unsuccessful" and there is reset option below it. When I pressed reset button, it took me to the twrp recovery. Now If I am flashing any of the ROM it says :
E: Unable to mount "/system"
E: Unable to mount "/cache"
E: Unable to mount "/data"
E: Unable to mount internal storage
What should I do now????
Guys plzzz help me to fix this problem!!!!! :crying:

anurag_shiva said:
Hello,
I am new to this forum. I was working on my phone. Suddenly it get switched off. when I switched it on the screen says that "Encryption Unsuccessful" and there is reset option below it. When I pressed reset button, it took me to the twrp recovery. Now If I am flashing any of the ROM it says :
E: Unable to mount "/system"
E: Unable to mount "/cache"
E: Unable to mount "/data"
E: Unable to mount internal storage
What should I do now????
Guys plzzz help me to fix this problem!!!!! :crying:
Click to expand...
Click to collapse
TWRP --> "Wipe" --> "Avanced Wipe"
Mark only 1 partition at a time and try
"Repair or Change File System" --> either "Repair" or "Change File System" (Most commonly "Ext4" but depends on phone)
What is your specific phone model?

LS.xD said:
TWRP --> "Wipe" --> "Avanced Wipe"
Mark only 1 partition at a time and try
"Repair or Change File System" --> either "Repair" or "Change File System" (Most commonly "Ext4" but depends on phone)
What is your specific phone model?
Click to expand...
Click to collapse
Sir, my device is lenovo a6000plus & I have done the same as you have instructed but it's not working. It says that unable to repair & unable to mount internal storage.
What should I do now??? Please help if it is possible.

anurag_shiva said:
Sir, my device is lenovo a6000plus & I have done the same as you have instructed but it's not working. It says that unable to repair & unable to mount internal storage.
What should I do now??? Please help if it is possible.
Click to expand...
Click to collapse
HERE you can find everything you need, stock recovery, firmware and a installation guide.

LS.xD said:
HERE you can find everything you need, stock recovery, firmware and a installation guide.
Click to expand...
Click to collapse
Actually the problem is that the storage is showing 0mb and whenever I am doing anything like flashing other rom or trying to format any of the data ,cache or internal it says unable to mount. Even l have tried QFIL to flash the firmware but it's also failed. Please tell me something.

Is the stock recovery working?
TWRP 3 already tried?
Possible simple solution: but you will LOSE EVERY FILE on userdata.
Step 1: Install TWRP
Step 2: Go to Wipe box
Step 3: Select Advanced Wipe
Step 4: Check "DATA" and tap on "Repair or Change File System".
Step 5: Tap Change File System
Step 6: See original format on file system (EXT4). So turn to other (e.g. ext3) and switch back to original
Now /data is mounted back.
You can also try to erase the partitions using fastboot commands
fastboot erase cache
fastboot erase system
fastboot erase userdata

LS.xD said:
HERE you can find everything you need, stock recovery, firmware and a installation guide.
Click to expand...
Click to collapse
LS.xD said:
Is the stock recovery working?
TWRP 3 already tried?
Possible simple solution: but you will LOSE EVERY FILE on userdata.
Step 1: Install TWRP
Step 2: Go to Wipe box
Step 3: Select Advanced Wipe
Step 4: Check "DATA" and tap on "Repair or Change File System".
Step 5: Tap Change File System
Step 6: See original format on file system (EXT4). So turn to other (e.g. ext3) and switch back to original
Now /data is mounted back.
You can also try to erase the partitions using fastboot commands
fastboot erase cache
fastboot erase system
fastboot erase userdata
Click to expand...
Click to collapse
I have done all these several times and as you have said that change ext4 to ext3 then revert to original. I have done this and it is changed to ext3 but not coming to ext4 again. When I restart my phone then automatically they are changed to ext4.
And yes I have also flashed stock recovery and it is working. But now I am in TWRP recovery.
What should I do now???
Images are attached.

anurag_shiva said:
I have done all these several times and as you have said that change ext4 to ext3 then revert to original. I have done this and it is changed to ext3 but not coming to ext4 again. When I restart my phone then automatically they are changed to ext4.
And yes I have also flashed stock recovery and it is working. But now I am in TWRP recovery.
What should I do now???
Click to expand...
Click to collapse
Have you tried the fastboot way?
Erase or format command

LS.xD said:
Have you tried the fastboot way?
Erase or format command
Click to expand...
Click to collapse
Yes I have run all the commands you told me to run but there is no change the same error message appears after doing this what to do next.???

anurag_shiva said:
Yes I have run all the commands you told me to run but there is no change the same error message appears after doing this what to do next.???
Click to expand...
Click to collapse
I tried my very best.

can anyone plzz tell me how to resolve this issue
whenever i am running any command on my lenovo A6000plus it shows error in twrp recovery
E:unable to mount system
E:unable to mount cache
E:unable to mount data
plz tell me how to get out of this probem. I can't flash any ROM @LS.xD

[Corrupt EMMC] [Unable to Mount] Bootlop on YU logo, Unable to Mount anything in TWRP

Background: I have a YU Yuphoria running latest cm13 snapshot (16 Sep, 2016), with latest Xposed framework and TWRP 3.0.2
* I woke up today to find a blank screen, battery reset gives "Encryption Unsuccessful" error message
* Booted to TWRP, unable to mount /data, /cache or /system (All 0 mb in Advanced wipe)
* Couldn't restore Nandroid backup, unable to mount /system
* Booted to fastboot, tried to do factory flash using flash_all.bat, everything succeeds except for system : "remote: flash write failure"
* Reformatted data, cache and system from adb shell, still no dice
What would you suggest i do now?
Is there a way to write those partitions to a microSD card, and make the phone think of it as internal storage?
Looking at this forum (and official YU forums), it seems like this is becoming a rather common problem [1 2 3 4 5 6 7]. How is it possible that so many users come to face this exact problem at the same time (In spite of being on different ROMs)?

reserved

A_K_S_H_ said:
Background: I have a YU Yuphoria running latest cm13 snapshot (16 Sep, 2016), with latest Xposed framework and TWRP 3.0.2
* I woke up today to find a blank screen, battery reset gives "Encryption Unsuccessful" error message
* Booted to TWRP, unable to mount /data, /cache or /system (All 0 mb in Advanced wipe)
* Couldn't restore Nandroid backup, unable to mount /system
* Booted to fastboot, tried to do factory flash using flash_all.bat, everything succeeds except for system : "remote: flash write failure"
* Reformatted data, cache and system from adb shell, still no dice
What would you suggest i do now?
Is there a way to write those partitions to a microSD card, and make the phone think of it as internal storage?
Looking at this forum (and official YU forums), it seems like this is becoming a rather common problem [1 2 3 4 5 6 7]. How is it possible that so many users come to face this exact problem at the same time (In spite of being on different ROMs)?
Click to expand...
Click to collapse
i'm also facing same problem. any solution u found?

Manish Adak said:
i'm also facing same problem. any solution u found?
Click to expand...
Click to collapse
Nope, ended up buying a new phone (Redmi Note 4)

A_K_S_H_ said:
Background: I have a YU Yuphoria running latest cm13 snapshot (16 Sep, 2016), with latest Xposed framework and TWRP 3.0.2
* I woke up today to find a blank screen, battery reset gives "Encryption Unsuccessful" error message
* Booted to TWRP, unable to mount /data, /cache or /system (All 0 mb in Advanced wipe)
* Couldn't restore Nandroid backup, unable to mount /system
* Booted to fastboot, tried to do factory flash using flash_all.bat, everything succeeds except for system : "remote: flash write failure"
* Reformatted data, cache and system from adb shell, still no dice
What would you suggest i do now?
Is there a way to write those partitions to a microSD card, and make the phone think of it as internal storage?
Looking at this forum (and official YU forums), it seems like this is becoming a rather common problem [1 2 3 4 5 6 7]. How is it possible that so many users come to face this exact problem at the same time (In spite of being on different ROMs)?
Click to expand...
Click to collapse
same problem....... i flash stock yu5010a firmware from fastboot.. now:good: but when i flash some files in twrp,strucked on boot animation....so im searching for only fastboot roms..........

A_K_S_H_ said:
Nope, ended up buying a new phone (Redmi Note 4)
Click to expand...
Click to collapse
which varient?

Vimalvt said:
same problem....... i flash stock yu5010a firmware from fastboot.. now:good: but when i flash some files in twrp,strucked on boot animation....so im searching for only fastboot roms..........
Click to expand...
Click to collapse
You mean flashing yu5010a firmware solves the problem for yu5010 [Cyanogen version] ? If so, could you post a link to the firmware version you used?
Manish Adak said:
which varient?
Click to expand...
Click to collapse
13k version (4gb, 64gb)

Vimalvt said:
same problem....... i flash stock yu5010a firmware from fastboot.. now:good: but when i flash some files in twrp,strucked on boot animation....so im searching for only fastboot roms..........
Click to expand...
Click to collapse
Change ur twrp to 3..0.2.0. That should solve the problm

13k version (4gb, 64gb)[/QUOTE]
tell me ur personal user exprience about note 4.....spcly camera...

Manish Adak said:
i'm also facing same problem. any solution u found?
Click to expand...
Click to collapse
Same problem here too! No solution yet.
Internal memory 0 mb
unable to mount system (invalid argument)
unable to mount data (invalid argument)
unable to mount cache (invalid argument)

samujjwalk said:
Same problem here too! No solution yet.
Internal memory 0 mb
unable to mount system (invalid argument)
unable to mount data (invalid argument)
unable to mount cache (invalid argument)
Click to expand...
Click to collapse
The same

Try changing partitions to f2fs or any other partition and change back to default partition...

AmalRam said:
Try changing partitions to f2fs or any other partition and change back to default partition...
Click to expand...
Click to collapse
In TWRP?
If yes, I tried that already.
Tried to convert to all available options and reverted back: FAT, EXT2, EXT3,EXT4, F2FS, VFAT
Nothing works actually.
The internal memory still shows 0 MB
I used a tool also called YUware. There is an option to format all partitions. It formats all but the system partition is failed to get formatted as well.

Twrp version?

try to erase persist.img and flash the persist.img

arun531 said:
try to erase persist.img and flash the persist.img
Click to expand...
Click to collapse
Doesn't work. Gives the same error message : "FAILED (remote: flash write failure)"

how did u flash...? can you lock bootloader ...?

arun531 said:
how did u flash...?
Click to expand...
Click to collapse
Using
fastboot -i 0x2a96 flash persist persist.img
(Source : https://forum.xda-developers.com/yu-yuphoria/general/guide-bricklooping-lettuce-yu-yuphoria-t3181864 )
arun531 said:
can you lock bootloader ...?
Click to expand...
Click to collapse
Yes.

try to flash cm12 fastboot pkg.... or try the qfil flashing...
i also faced this type problem but when i erase and reflash the system and persist... it fixed.

arun531 said:
try to flash cm12 fastboot pkg....
Click to expand...
Click to collapse
That is what i did, as i mentioned in OP :
A_K_S_H_ said:
* Booted to fastboot, tried to do factory flash using flash_all.bat, everything succeeds except for system : "remote: flash write failure"
Click to expand...
Click to collapse
arun531 said:
or try the qfil flashing...
i also faced this type problem but when i erase and reflash the system and persist... it fixed.
Click to expand...
Click to collapse
Isn't qfil flashing meant for Hard Bricked devices? (My device doesn't show up as QHUSB_BULK when connected to PC)

Unable to mount data TWRP

Hello guys
so I was using TWRP Recovery for years and everything worked fine, till I installed lightrom, after the installation I wanted to flash a zip file it said unable to mount storage and failed to mount /data
So I formated data rebooted in recovery and it worked for the first time after a reboot in the system, the error came again. I tried to change file system from ext4 to ext2 and back to ext4 and it worked but after a reboot it was failing again, I tried to flash no-verity-opt-encrypt-6.0 and it was failing after a reboot as well. This is making me so much troubles. Does anybody has a fix on it I would be very thankful.

Sharky45 said:
Hello guys
so I was using TWRP Recovery for years and everything worked fine, till I installed lightrom, after the installation I wanted to flash a zip file it said unable to mount storage and failed to mount /data
So I formated data rebooted in recovery and it worked for the first time after a reboot in the system, the error came again. I tried to change file system from ext4 to ext2 and back to ext4 and it worked but after a reboot it was failing again, I tried to flash no-verity-opt-encrypt-6.0 and it was failing after a reboot as well. This is making me so much troubles. Does anybody has a fix on it I would be very
You need twrp with quota management
Click to expand...
Click to collapse

cooltt said:
Sharky45 said:
Hello guys
so I was using TWRP Recovery for years and everything worked fine, till I installed lightrom, after the installation I wanted to flash a zip file it said unable to mount storage and failed to mount /data
So I formated data rebooted in recovery and it worked for the first time after a reboot in the system, the error came again. I tried to change file system from ext4 to ext2 and back to ext4 and it worked but after a reboot it was failing again, I tried to flash no-verity-opt-encrypt-6.0 and it was failing after a reboot as well. This is making me so much troubles. Does anybody has a fix on it I would be very
You need twrp with quota management
Click to expand...
Click to collapse
I solved the problem with the twrp from Tkkg1994
Click to expand...
Click to collapse

0 mb in TWRP internal storage

I searched for an answer and noticed it's a common issue. I am trying to flash a kernel on to my already flashed rom. I was wondering if there is a more current fix. More importantly, how can this be avoided in the future. Thank you guys!

Its caused by a bug/error with either the filesystem or encryption.
Did you wipe data after flashing the new ROM? Data from stock usually doesn't work with custom ROMs.
Do you have a PIN/password on Android?
Are you using the latest build of TWRP?
Press the menu button at the bottom of the screen in TWRP and post what the error message is in the red text.

It's caused by no root access

djhulk2 said:
It's caused by no root access
Click to expand...
Click to collapse
Something is probably wrong with the data partition. TWRP should always have root access.
Try in TWRP:
Wipe > Format Data > Slide to format
This will erase the data partition, so backup everything to a PC in Android first if needed. It should allow TWRP to mount /data again.

KemikalElite said:
Something is probably wrong with the data partition. TWRP should always have root access.
Try in TWRP:
Wipe > Format Data > Slide to format
This will erase the data partition, so backup everything to a PC in Android first if needed. It should allow TWRP to mount /data again.
Click to expand...
Click to collapse
I've debated on doing this. I'm not worried about losing pictures texts etc as they're backed up.
I read that it essentially leaves the device with no OS. If that's wrong please let me know!

I have found that if I choose Slot A and reboot system it reboots me in to TWRP. If I choose Slot B it runs the OS like normal (except I still have issues using Facebook and it's services).
The ROM works and I can perform all the custom mods on it. I just want to flash a kernel and the problem persists. 0 mb in storage.
It's trial and error at this point. Fail fast fail forward. I have another phone I can use but I love the OnePlus. Any help will be appreciated!

https://andi34.github.io/faq/faq_twrp.html
I'm not willing to risk it until I know how to get the custom ROM on to the storage to flash it.

Yes formating by typing in yes will wipe it all,everything including pictures, with no rom on it at all. If u choose to do that, don't close twrp. Instead you should be able mount after wards, once mounted transfer the magisk zip, twrp, and your custom rom(has to be 1.5gb not 200mb through magisk). Flash magesik, install ram disk twrp, install rom. That was a method I've done before but if u want to keep everything there is other way
fastboot boot twrp.img, that command boots twrp if u have it or don't, installing to ram disk makes it permant...this boot command is just a one time thing each time. It's what I do when new firmware update, I loose root but I regain it each time

Never heard of formating data removing the OS, that would be if you wipe the system and normal wipe is like a factory data reset and therefore will not wipe your phone of the OS

djhulk2 said:
Yes formating by typing in yes will wipe it all,everything including pictures, with no rom on it at all. If u choose to do that, don't close twrp. Instead you should be able mount after wards, once mounted transfer the magisk zip, twrp, and your custom rom(has to be 1.5gb not 200mb through magisk). Flash magesik, install ram disk twrp, install rom. That was a method I've done before but if u want to keep everything there is other way
fastboot boot twrp.img, that command boots twrp if u have it or don't, installing to ram disk makes it permant...this boot command is just a one time thing each time. It's what I do when new firmware update, I loose root but I regain it each time
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Click to collapse
I attempted to format. It said
"failed to mount /data (device or resource busy)
"unable to mount storage"

Try this in recovery, sometimes its known to work.
Wipe > Advanced Wipe > Check Data and press Repair or Change File System > Change File System > Change it to EXT2.
Repeat the same process selecting Ext4
Wipe > Advanced Wipe > Check Data and press Repair or Change File System > Change File System > Change it to back to EXT4.
Try formatting data after this.

drey4211 said:
I attempted to format. It said
"failed to mount /data (device or resource busy)
"unable to mount storage"
Click to expand...
Click to collapse
Since you dont care about the data on the phone I would just do 1 of 2 things. 1st I would reflash twrp on to you phone if that doesn't work then I would just grab the fastboot ROM and just flash your phone back to full stock reroot and install twrp from scratch. I would not try to start repairing partitions. I wouldn't want to worry about screwing up the EFS partition

Well in an update, I formatted the
Storage and now I'm stuck in bootloader screen. It's unlocked but I'm having a hard time flashing a ROM through adb.

I use the twrp version 3.3.1-2
Best would be to just use fast command to boot it
But it should be under wipe/format data/then type in yes

That was what I was trying to have you avoid. If your can boot to fastboot download the fastboot ROM I told you to and run the flash-all.bat file. If your on 9.5.8 make sure you use the fastboot ROM of the same version. Do not flash azip of a different version firmware like 9.5.7.

It happens to me any time I'm in twrp and flash a rom then reflash twrp. It doesn't matter if I flash Magisk or not the issue always happens. What I do is use a USB C flash drive and plug it in when I want to flash/backup a rom. This way I can always access it. After flashing any rom then booting I'm always able to access my internal storage again. It seems like a bug in twrp.
The strange part is when this bug happens your files are encrypted in a 0 folder but you can still copy from your PC to your internal storage while in twrp.

I essentially soft bricked my device. Called OnePlus and they got me up and running. That's awesome that they have that service!

Are you removing all security? Pattern, pin and fingerprints? Are you decrypted? Never had an issue with flashing a ROM causing these issues which is why I'm asking. Something you've done at some point is causing this

I'm not sure what that was. Ironically enough I am now stuck in TWRP boot loop. Hopefully I can figure this out otherwise I have to call oneplus again.
I will admit I may not know everything but it's trial and error. I don't have anyone to really teach me this so I try to read the forums and learn. You guys have been great!

ajsmsg78 said:
It happens to me any time I'm in twrp and flash a rom then reflash twrp. It doesn't matter if I flash Magisk or not the issue always happens. What I do is use a USB C flash drive and plug it in when I want to flash/backup a rom. This way I can always access it. After flashing any rom then booting I'm always able to access my internal storage again. It seems like a bug in twrp.
The strange part is when this bug happens your files are encrypted in a 0 folder but you can still copy from your PC to your internal storage while in twrp.
Click to expand...
Click to collapse
I've the same issue.. did you find a fix? So annoying