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[Q] Problem with external SD Card permissions

Hi everyone.
I've got a problem with the permissions of my brand new Micro SD Card. When I plug it in my desktop computer, I can obviously write on it, but as soon as I put it in my tablet, I can only read the files I put on it, not modify/delete them or write new ones. I tried to change the permissions with Root Explorer, but I fails.
My tablet is rooted and I flashed the official CM10. As I read that exFAT is not supported by CM10 on this tablet I formated the SD card in NTFS.
So, can someone help me with this ?

The vanilla Linux kernel can only read NTFS, but not write to it. For write support you need either a proprietary kernel module (which the stock ROM includes, along with one for exFAT), or FUSE with ntfs-3g (which might not yet be included in CM).
Workaround: format with FAT32.

Thanks for your answer. I could reformat my card in FAT32, but then I wouldn't be able to put files larger than 4 GB on my card.
I guess I'll stay in NTFS for now, and hope that exFAT will be supported by CM10 someday.

SD card partition for cross-platform - FAT32 or exFAT?

I have a 64GB microSDXC and I want to use this between my Surface, Nexus 7 tablet, Windows 7 and OSX. What is the recommended partition I need to format the SD card?
I have MacDrive for Windows 7 (can read Mac partition in Windows) and NTFS Drive for OSX (can read NTFS in Mac). Obviously Android cannot read NTFS, so I am down to FAT32 (cannot read file larger than 32GB) or exFAT.
Is exFAT compatible with Android and OSX?

SDXC uses exFAT, so if your devices are SDXC-compatible, they should be able to read (and hopefully write) exFAT. However, unless you need to move files bigger than 4GB (which happens on occasion, but not *very* often) I'd go with FAT32; *everything* supports that.
Another option is UDF (which is a format intended for re-writable CDs and DVDs, mostly, but can be used on anything). Linux (and therefore hopefully Android) has supported that for years. I don't know if it has a 4GB or similar file size limit, though. I don't really know what filesystems Android supports, though... it might actually be able to handle NTFS, especially if you root it and install (an ARM compile of) the Linux NTFS drivers (either as a kernel filesystem, or using FUSE and ntfs-3g, which is how I'd recommend doing it if FUSE is available for Android).

Since when does the nexus 7 have a sdcard slot?

omaropa said:
Since when does the nexus 7 have a sdcard slot?
Click to expand...
Click to collapse
I use USB TO GO cable to connect a mini Micro SD card reader.

You should be able to get an NTFS driver for the N7 (I had one on my last Android tablet), though Fat32 will give the best compatibility. Fat32 can be on disks larger than 32GB, Windows just won't let you format them to that. Format them on the Mac or on the Android tablet.

Will the P3100 read a 2.5in 1TB external HDD??

I have a 2.5in 1TB external hard drive, but when I connect it to my P3100, it gives me the "empty storage or unsupported file system" error.
It is not the problem of the drive requiring more power than the tab provides, because I am using the Y cable to supply additional power to the drive.
After searching and reading up on the problem, I understand that Android does not support NTFS file system. So, I was wondering if I formatted my drive to the ExFAT file system, will my tab read it then??
By the way, my tab is rooted and running Adis SungsonicHD V-7 ROM at the moment.
Thanks

ExFAT is also a proprietary Windows format. You'd need to format to FAT32 and even then you'll prolly have to make more than one partition to use it all. Just Google for applications that format external drives to FAT32.
Sent from my Nexus 4 using XDA Premium HD app

Marshmallow SD Card Issues

Hey guys,
I was hoping someone with some experience with Android M could help. After installing the OTA update and upgrading to Marshmallow, it seems that the OS makes you format microSD cards as either portable or internal storage. The issue that I'm running into is that after formatting the memory card as portable storage, the system formats it as Fat32 so I can no longer transfer large MKV files to play in Kodi. Prior to installing the 6.0 OTA, I had no issues transferring the files to my microSD card.
As a workaround, I tried using my USB OTG drive to play the videos but I can't get Kodi to recognize the drive as a source for my video files. Does anyone have any suggestions on how to get around these new memory card complications that Android 6.0 has introduced?
I would greatly appreciate some help on this as this was one of the main reasons I purchased this tablet so that I could use it as a temporary HTPC when I'm traveling. Thanks in advance!

Have you tried removing the SD CARD and formatting on a PC?

Seems that Marshmallow's not all it's cracked up to be.

Don't have marshmallow, but have you tried reformatting the SD card on your PC using exFat or NTFS instead?
I don't know if marshmallow will prompt you to reformat again when you put the card back in the Shield though...
Sent from my SHIELD Tablet using XDA Free mobile app

You didn't mention what size of card, but if it is larger than 32gigs you will need to put the sd card in a computer and format as NTFS. Android doesn't support exfat, only fat32 and NTFS. Try that and let us know what happens!

hbar98 said:
You didn't mention what size of card, but if it is larger than 32gigs you will need to put the sd card in a computer and format as NTFS. Android doesn't support exfat, only fat32 and NTFS. Try that and let us know what happens!
Click to expand...
Click to collapse
Funny...running a 64GB SDCard formatted exFat right now on my original ST8 (Lollipop)...and also a 16GB SDCard formatted exFat on my old Samsung S4 (also Lollipop).
Sent from my SHIELD Tablet using XDA Free mobile app

Try to restart tablet? The best is using es Explorer to transfer files. Fat32 do not accepted file over 4gb. Try format back exfat
Sent from my SHIELD Tablet K1 using Tapatalk

An Droid said:
Funny...running a 64GB SDCard formatted exFat right now on my original ST8 (Lollipop)...and also a 16GB SDCard formatted exFat on my old Samsung S4 (also Lollipop).
Sent from my SHIELD Tablet using XDA Free mobile app
Click to expand...
Click to collapse
(sarcasm)
Oh, wow! Your personal experience with two different phones made by two different manufacturers running an old system that was never designed for what Marshmallow does obviously contradicts and demolishes what I said.
(/sarcasm)
ExFat support can be added to android kernels, if the manufacturer decides to do so. Samsung, a maker of sd cards ranging from 4gigs to 200+gigs, has an interest in making sure that their devices work with their cards that also work in a variety of consumer computers. ExFat support can also be added in customer kernels, should the maintainer decided to do so (in fact, many kernels that I see for modern devices that also support an external sd cards proudly show that they support ExFat).
Android AOSP, without any mods or other built in support, does not support ExFat well, if at all. It may or may not work. The fact that nVidia has written that any cards over 32gig must be formatted to NTFS tells me that they have not chosen to build in ExFat support into their devices. Should someone desire to flash a different rom or custom kernel that support ExFat, that is their business. But since the OP didn't list what size of card they used, or if they were using any mods or a different kernel, I had to go with the most basic support.

hbar98 said:
(sarcasm)
Oh, wow! Your personal experience with two different phones made by two different manufacturers running an old system that was never designed for what Marshmallow does obviously contradicts and demolishes what I said.
(/sarcasm)
Android AOSP, without any mods or other built in support, does not support ExFat well, if at all. It may or may not work. The fact that nVidia has written that any cards over 32gig must be formatted to NTFS tells me that they have not chosen to build in ExFat support into their devices. Should someone desire to flash a different rom or custom kernel that support ExFat, that is their business. But since the OP didn't list what size of card they used, or if they were using any mods or a different kernel, I had to go with the most basic support.
Click to expand...
Click to collapse
ST8 = Shield Tablet 8" (original vs. K1 model).
Point is, this goes against your open ended and incorrect "Android doesn't support exfat, only fat32 and NTFS" statement.
Supporting exFAT in Android makes sense as it's the recommended file system by the SDCard association for SDCards larger than 32GB.
NTFS is in the same boat - it's also not officially supported by all Android implementations.
Marshmallow formats SDCards to Ext4 (and encrypts) when configured as internal storage. When configured as portable both exFAT and NTFS (and Fat16/32) may all be an option - OP can try both if using the portable option.
Sent from my SGH-I337M using XDA Free mobile app

Similar problem with lg g2 on marshmallow
Hi,
Having a related problem with kodi on my phone.
On lollipop, kodi found my 16gb Fat32 otg USB drive as a source, but won't show up now I'm on marshmallow. I can still play video through mx player, fx explorer media viewer, and os video player. I searched around storage and mount folders, but can find no access to the external drive browsing the file system unless I'm using the native file browser.

Marshmallow detects partition very different with Lollipop. on Marshmallow your device can use sdcard with 128 GB like internal
its mean sdcard needed change partition format to another type (not FAT, NTFS or exFAT) the matter here then you plug that sdcard to windows, windows wont detect your sdcard but you can see it through another program like MiniTool Partition Wizard.
The problem with marshmallow and this partition used to drop out connect with your sdcard. only one way to fix it reboot your device. also, sometime they cant turn wifi on then you just needed to reboot again to let your device working normally.
We needed to wait for a new patch.

NTFS for SD?

I just noticed that SD cards formatted in NTFS via USB work on the Shield tab (Lollipop). So, would it also work in the SD card 1 (slot)?

You need to mount the sdcard in ntfs mannually with third app.
Sent fro SomeFon

No. It also works in the SD slot.

What device? He he.
Sent fro SomeFon

Shield.

I am searching an android device installed upon ntfs, due to several hardware concerns that ext2/3/4 causes in emmc or ssd disks, i experienced bootloop, only because an ext2 error on my sdext2 partition, i took out the sdcard, and the phone booted normally.
Ext any kind, i believe exfat is brother of ext, Nevermore i pretend use.
After i learned that kingston taiwan's original notebooks ssd disks, are usinf ntfs, and i still never seen any notebook with standard linux installed, think with me: may be why?
Hm.
Now, i modded the link2sd scripts to start sdext2 in a ntfs partition, 2Giga is the minimum for good ntfs usage, and what i am experiencing, is not comparable with any device that i had, is crazyly fast, stable, and no errors.
Sent fro SomeFon

See this:
Ntfs breaks cached ads.jar in various apps.
Anyone heard somewhere , the gogle will change the adwares method?
Ha, may it because why?
See the pictures:
Youtube, running on sdext2-ntfs
And the File explorer showing the youtube cache folder,
The ntfs security, detected remote code in cache.
Called by ads.jar 1 & 2
The ntfs security, stopped these jars, and renamed to .fusehidden... that you see on the picture.
So?
What more the damn ext1/2/3/4 Done for away desteoying devices via malicious cached dexes and jars codes?
Sent from SomeFon