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Android support micro SDXC (max 2TB) & FAT64 filesystem developement

Hi, I wan't to develop a new thing..
according to :
http://en.wikipedia.org/wiki/Microsd#Compatibility_issues_with_4.C2.A0GB_and_larger_cards
SDHC hosts which have drivers which recognize the newly used capability bits, and have operating system software which understands the exFAT filesystem, are compatible with SDXC cards.
currently (as Feb 2011), the Android doesn't have drivers to recognize exFAT (or FAT64), .... (or tell me if I'm wrong about this)
it's possible for us to insert SDXC card (more than 32GB) to the current SDHC host and recognize it.
but because my phone is Milestone (locked bootloader & signed kernel)
I can't test my own kernel directly to my phone. I need help other developers (who interested about this) to develop this thing ..if you wan't to contribute, then any previous work about propietary FAT64 file system is appreciated (sorry, must be open source)
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please join the development page @ http://code.google.com/p/android-sdxc-fat64/
P.S: sorry my english is bad, english isn't my native language

hello, anyone interested ?

I'd say try the question in this section: http://forum.xda-developers.com/forumdisplay.php?f=613
Sent from my Desire HD using XDA App

expanding on old ways
I don't know if this helps you but in older systems for phones you could fool the phones into thinking there where extra partitions to the cards, for example my palm centro capped out at 4 gig but i ran a 16 gig card inside it. I had to reformat the card from fat32 to fat16 or SDHC to Regularly SD and then was able to partition 4 gig spots, i had to partition becuase anything over the 4 gig limit would not be read. So i am curious to try a SDXC card in my fascinate and see where it gets me, but i have to wait till i get one of the cards. Otherwise it was a simple file mod and the card worked marvelously so if you have to partition 32gig sections that still a pretty large cap. Hope this helps you a little.

update: Apple has shipped new Mac with SDXC card slot
I estimate only take 4 - 7 month until HTC/Motorola will ship their new android phones with SDXC card slot

These cards are confirmed working in several Android's now:
http://www.androidnz.net/2011/09/sandisk-64gb-micro-sdxc-cards-confirmed.html

wow thanks, but it's new device
old devices still can't access newer microSD

Yeah if you want more then 4GB file size "exFat" currently not supported.
But you can still use SandDisk SDXC 64GB micro cards , just need to reformat them to fat32 , phone does it for you actually , talking from experience we had a long thread over at SGS2 forum section.
I have SGS2 and using Sandisc 64GB SDXC , upon insertion phone offered to format it as it did not recognize exFAT , after format it works just like any other SDCARD, max file size is <4GB under fat32.

See here: http://forum.xda-developers.com/showthread.php?t=1711310

[I9001][Q]Sandisk Ultra Class 10 microSDHC 32GB incompatible?

Hallo,
i've bought a Sandisk 32GB microSDHC and it doesn't run properly. It unmounts/vanishes after some seconds or crashes/freezes the whole OS (Android) if accessed. Same happens in CWM5/6. The card does work properly in Windows though (speed/reliable). Another Sandisk 16GB class4 works properly in the phone.
Anything known about incompatibilities regarding this card? Anyone using it without problems?
Sandisk Ultra Class 10 microSDHC 32GB
(SDSDQU-032G-U46A)
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I have the same card and it is perfect on my Galaxy S

Thanks.
Anyone else with explicit confirmation on S Plus (I9001)? Seems to have a different controller.

I think it's your rom (if not using stock) because i had same problem on some rom-s
Sent from my GT-I9000 using xda premium

Possible.. but i had this on CWM5/6 as well. Exactly the same issues. Just vanishes with i/o error. In the end a hotswap insert completely corrupted my system partitions (/system, /data at least). The card has been returned. Looks more like a UHS first generation bug or something to me. Maybe they run it out of specs on purpose to get better benchmarks. I don't know. At least I've found other people with same experiences on Google and Amazon that occur on that Sandisk cards.

Also got same card and works fine without any errors. Maybe the sdcard voltage is set too low in kernel or rom

I have the same card and works also perfect.
Running Stock Rom and no errors.
kind regards dekker

Have you tried formatting it with android under settings>storage?
Sent from my GT-I9000 using xda premium

If somebody have problems with SD Cards on Galaxy S than its Sandisk. I use Samsung SD Cards and have never any problems.

I got the same problems and after 3 months of usage the card died and I RMAed it. So be carefoul not to store any extremely valuable data.

sandisk ultra 32gb error on s4
i have galaxy s4 16gb with sandisk ultra microSD HC 32gb. after used a few hours my microSD card can't play video, can't open music or pictures thus can't delete the files. try to format it from options -> storage. it says blank sd card, but it's readable when i open it with windows7. try formatting from windows7 but the problems occured again after a few hours ( seems the problems occured when i tries to play large HD video clip, about 1920 x 1080 pxl video resolution ). is this error caused by sandisk or my galaxy s4 can't work with 32gb card ?

Problem is that Windows doesn't format SD cards properly, just good enough for its own purposes. Download the SD formatter from the SD consortium, and then do a full wipe. Your card now is really formatted as it should, and try again on your phone

Not necessary, I had similair issues as the OP and according to HD Tune my SD was heavely damaged..

SD card problem

I can't get Google play music to play my music from my card reader worked on my Nexus 6p but can't get it to work on my pixel anyone got a idea why it wouldn't work?

I had trouble with a usb flash stick. My Pixel couldn't read the Fat32 partitioned stick wanted to format it to some Android format format, so I did. Then it wouldn't play the mp3s from my phone on my friend's amp that accepts Fat32.
You might have luck if you format the SD card with the Pixel then put the files back on it.
I had lots of issues with my Mac Pro connecting to Pixel as MTP or PTP. I hope for bug fixes and performance improvement in 7.1.1
:Alwayshopingforfixesandimprovement:
Sent from my sailfish using XDA Labs

I've just plugged a couple of FAT32 USB thumb driver into my Pixel via a USB C to USB 3.0 adaptor (which Choetech kindly sent me to review), and they worked absolutely fine. Wanted to format an NTFS formatted drive, but that was to be expected.

I'm trying to back up photos from my camera, and I can't get my 64gb SD card to work. It's formatted as exFAT since that is standard for SDXC cards. A smaller FAT32 SD card works most of the time if I tap the right settings after I plug it in.
I am using the included OTG dongle, and I tried a couple different SD card readers. All the combinations of cards and readers work on my computer.
I was able to get it to work using Solid Explorer and the Solid Explorer USB OTG Plugin, but the transfer speed was like 48kb/sec, and it was going to take 300 hours to back up the photos on my SD card at that rate. It's worth a try, and you can get a refund for the plugin if it's extremely slow for you too.

.. and here we see why many phone manufacturers are opt'n not to include removeable storage, even without an sd card, people have issues with their sd card.
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clockcycle said:
.. and here we see why many phone manufacturers are opt'n not to include removeable storage, even without an sd card, people have issues with their sd card.
Click to expand...
Click to collapse
There may be reasons not to have internal SD storage, like profit, performance, and maintaining control of the file structure. But that's not a good reason not to have external storage work. For example, many laptops now come with proprietary or soldered internal SSDs and no way to add internal storage. But you would definitely expect to be able to use SD cards with them, for example to get photos off your camera. It seemed to work most of the time for phones that had microSD slots, so there's no reason why it shouldn't work now.
Finally, when the iPad came out, being able to edit photos from your camera was a selling point. I would expect that to work on the latest Android phones 6 years later.

SD installed as internal storage, internal storage full, SD nearly empty, WTF?

I installed a 128gb MicroSD card in my Shield tablet and thought everything was setup, it formatted and encrypted the card to my tablet and when using a file manager app it shows one big honking storage drive, however when I go through settings I can see that my microSD card is barely touched and the internal drive is full, so full that I can't install anything else unless I delete something.
WTF is the point of having the microSD setup as internal storage if it doesn't share the install load?
Now I am trying to migrate data to the microSD card and I get the error that there is not enough storage space.
What can I do to fix this? :crying:
Screenshot:
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P.S. as an aside, could this be happening because the microSD card is a fake?
I don't think it is, but can't figure out why I am having this issue
I should add, I purchased this microSD
Lexar High-Performance microSDXC 633x 128GB UHS-I Card

Please XDA, you're my only hope

I don't think your SD is set up as adoptable storage yet. When it is it should look something like this:
This SD is set up as adoptable plus removable though, usually you will only see the adoptable part of it. As I will never fill the entire SD with "internal" content this way was better for me :good:

Interesting, begs the question, how did you set that up?
I just looked through my options, im not seeing it

Just looked it up, i followed those steps, my card has been formatted as internal and i moved data to new storage

Just formatted the card on my PC (the long way), then formatted as portable on tablet, restart, then format as internal, restart, then move data, and nothing has changed.
I am using android 7.

Not sure if you resolved this, but if you select the SD card the screen will switch. The 3 dots in the top right corner, then select migrate data. All the apps that can be moved will be moved.

query about memory card size

hi all,
i recently purchased infinix zero turbo 2023 , which has a micro sd card, the phone’s spec says it supports micro sd card upto 256 gb , i want to use 1tb micro sd card would that work, has anyone tried adding memory card higher than what the phone’s spec says , what has been your experience
thank you

Doesn't work: 256 GB is maximum.

I doubt you will find member that has tried, so just try yourself. check /proc/filesystems if exFAT is listed. as long as the phone supports the SDXC standard it may work up to 1 TB, as the address is within range.
0x3FFFFFFFFF = 256 GiB
0xFFFFFFFFFF = 1 TiB
the limitation is maybe just at time of writing the specs there wasn't simply such large SD cards on the market.
so it's tial & error.

pro9964 said:
hi all,
i recently purchased infinix zero turbo 2023 , which has a micro sd card, the phone’s spec says it supports micro sd card upto 256 gb , i want to use 1tb micro sd card would that work, has anyone tried adding memory card higher than what the phone’s spec says , what has been your experience
thank you
Click to expand...
Click to collapse
No you cant, you can just use sd cards which is 256gb or less in size also if you want more storage try cloud storage

I'm sure it would work fine! Might need to format it first in Android settings, I used to have a ps3 with a 2tb HDD (supposedly not supported at the time)
Never use cloud BTW store your data locally so its literally in your hands not some stranger.

pro9964 said:
hi all,
i recently purchased infinix zero turbo 2023 , which has a micro sd card, the phone’s spec says it supports micro sd card upto 256 gb , i want to use 1tb micro sd card would that work, has anyone tried adding memory card higher than what the phone’s spec says , what has been your experience
thank you
Click to expand...
Click to collapse
Incorrect: Phone supports microSDXC cards
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what basically allows you to format them as exFAT - a filesystem developed by Microsoft - and what can hold data up 2 TB.
Take note that it's up to OEM's discretion if they include exFAT driver in their kernel (and executables in userspace) after having an agreement with Microsoft or their partners. So check whether phone's Android can handle exFAT or not. AFAIK only some Samsung phones can.