I have an micro USB card reader (cheap aliexpress one but works great).
it works with all my SDXC cards up to 64 GB in my S7.
But with my new SDXC UHS1 [3] 128GB card it just doenst work in my S7.
When i plug the card reader in my desktop it works great (so the card reader isnt defect).
Is the OTG port not supported for UHS1 [3] 128GB cards?
edit:
my panasonic formats its as exfat.
Doenst otg support Exfat?
When I place SD card in my internal slot it works.
It seems the S7 doenst support otg exfat.
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I bought 2 Sandisk 64gb Micro SDXC cards and put one in the pad ant the other in the keyboard using the SD card adapter that came with the cards. Everything was fine the cards were mounted and were also recognised in Windows XP SP3 when I connected the pad to my PC using the Asus USB cable that comes with the pad. The problems started when I had over 33gb of data to transfer to one of the cards, it was going to take a long time and I thought it would be quicker if I connected the Micro SDXC card directly to the PC using a USB adapter - one of those small adapters that I got with some 32gb Micro SD cards - I tried two, one was a Lexar LRWM01U-7000 (Rev A) and the other a SanDisk D33D21.
Windows said the cards were RAW and had to be formatted so I formatted them and ended up with cards of only 27.4gb. Asus support said "the TF700 has been tested with micro and full size SD cards up to a capacity of 32GB. You may find Larger capacity cards also work but these have not been confirmed".
The best help came from Sandisk who have been very good and quick to respond. They thought that the TF700T may not support 64gb Micro SDXC cards and even offered to replace my 2 cards with 4 32gb Micro SD cards. They told me that the adapters I used (Lexar LRWM01U-7000 (Rev A) and the other a SanDisk D33D21) support only MicroSD/SDHC cards up to 32GB, not MicroSDXC 64GB cards. They suggested I try again with a USB card reader that supports Micro SDXC. So I bought a Trust multicard USB 3 reader which supports MicroSDXC. I could now see all the unused part of the cards in Disk Management. I used the free EaseUSPartition Master to wipe the card and then set it as an unformatted active partition. I then used SDFormatter V3.1 to format the cards to exFAT and everything now works fine. (The Sandisk 64gb Micro SDXC cards come formatted in exFAT when new)
I have seen comments that the cards have to be formatted in FAT32 but I have not found this to be the case. exFAT seems to work fine on the TF700T. The problem lies with Windows XP it will not recognise an exFAT 64gb Micro SDXC card when it is plugged directly into a dedicated Micro SD slot on the Trust multicard USB 3 reader, however if you put the Micro SD card in the SD adapter that comes with the card and then put this in the dedicated SD slot on the reader Windows XP will now see the card (Windows 7 SP1 however will recognise the card without having to use the SD adapter). I presume from the comments regarding FAT32 that a card with this format may well be recognised by XP in the dedicated Micro SD slot on the reader but I have not tried this. If you want FAT32 then you can do this with EaseUSPartition Master but if you need files of more than 4gb you will have to use exFAT.
sorry, you need to rephrase that if you want anyone to read it. As it is now, it is way to compact to read.
I bought 2 Sandisk 64gb Micro SDXC cards and put one in the pad the other in the keyboard using the SD card adapter that came with the cards.
Everything was fine the cards were mounted and were also recognized in Windows XP SP3 when I connected the pad to my PC using the Asus USB cable that comes with the pad.
The problems started when I had over 33gb of data to transfer to one of the cards.
This was going to take a long time I thought it would be faster if I connected the Micro SDXC card directly to the PC using a USB adapter.
It was one of those small adapters that I got with some 32gb Micro SD cards. Tried two, one was a Lexar LRWM01U-7000 (Rev A) and the other a SanDisk D33D21.
Windows said the cards were RAW and had to be formatted.
Formatted them and ended up with cards of only 27.4gb.
Asus support said "the TF700 has been tested with micro and full size SD cards up to a capacity of 32GB.
You may find Larger capacity cards also work but these have not been confirmed."
The best help came from Sandisk who have been very good and quick to respond.
Sandisk thought that the TF700T may not support 64gb Micro SDXC cards and even offered to replace my 2 cards with 4 32gb Micro SD cards.
I was told that the adapters I used (Lexar LRWM01U-7000 (Rev A) and the other a SanDisk D33D21) support only MicroSD/SDHC cards up to 32GB, not MicroSDXC 64GB cards.
They then suggested I try again with a USB card reader that supports Micro SDXC.
I then bought a Trust multicard USB 3 reader which supports MicroSDXC.
Now all the unused parts of the cards in Disk Management could be seen.
Using the free EaseUSPartition Master to wipe the card and then setting it as an un-formatted active partition.
I then used SDFormatter V3.1 to format the cards to exFAT and everything now works fine.
(*The Sandisk 64gb Micro SDXC cards come formatted in exFAT when new.)
I have seen comments that the cards have to be formatted in FAT32 but I have not found this to be the case. Formatting in exFAT seems to work fine on the TF700T.
The problem lies with Windows XP it will not recognize an exFAT 64gb Micro SDXC card when it is plugged directly into a dedicated Micro SD slot on the Trust multicard USB 3 reader.
Although if you put the Micro SD card in the SD adapter that comes with the card and then put this in the dedicated SD slot on the reader Windows XP will see the card
(*Windows 7 SP1 however will recognize the card without having to use the SD adapter.)
I presume from the comments regarding FAT32 that a card with this format may well be recognized by XP in the dedicated Micro SD slot on the reader but I have not tried this.
If you want FAT32 then you can do this with EaseUSPartition Master but if you need files of more than 4gb you will have to use exFAT.
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Mmmm...lots of good info there thanx!
My dad and I bought a handful of these when they went on sale on Amazon. Mine worked fine after formatting, but both if his were saying the same thing yours did. I thought that was odd, it seemed like they were 32 gig cards. So I opened up a partition tool on my laptop and it turns out that Sandisk has over 30 gigs partitioned as unused space. All you have to do is delete the partitions and repartition the whole card on one partition and you'll be good to go. I used Fat32 if anyone is interested.
Sent from my unlocked Transformer Infinity
thanks for the helpful post. can you also run some sd card tests? i'm curious to see how true their class 10 rating is.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
I ran a few compared to my Lexar class 10 and they performed about the same. ~10 write and ~30 read.
Sent from my unlocked Transformer Infinity
So I recently got a USB OTG adapter and it works fine with my thumb drives, but when I try using a microSD card with it, either through a usb dongle thing or a microSD to SD card adapter, it won't mount. The card is formatted in Fat32 but I have tried ntfs and Fat16. It is a class 10 card, but my class 2 won't work either.
4th vategym
billypoke said:
So I recently got a USB OTG adapter and it works fine with my thumb drives, but when I try using a microSD card with it, either through a usb dongle thing or a microSD to SD card adapter, it won't mount. The card is formatted in Fat32 but I have tried ntfs and Fat16. It is a class 10 card, but my class 2 won't work either.
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Do you have any other microsd card to try? Or another adaptor?
dydigital said:
Do you have any other microsd card to try? Or another adaptor?
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Click to collapse
Yeah, I've tried both the 8GB class 10 card that I have as well as a 1GB card of unknown class (It's older, so probably 1 or 2). I also tried both a USB to microSD adapter as well as a full size SD card reader with an SD to MicroSD adapter. I have the USB OTG Helper app by Ray of Light (in Play Store). I'm on Synergy right now, but I'm considering trying an AOSP rom to see if that is the problem.
Does our smartphone support that capacity? I need more for long hd video
Thank in advance
Well they recommend 32GB I've not tested it with 64 gigs
-removed-
I can personally confirm the Xperia M2 does support Micro SDXC UHS-I cards, tecnically of up to 128GB, but I'm not too sure about that.
In my case, my Samsung MicroSDXC Professional of 64GB works quite well for 1080p recordings, almost no wait time. Write Speed of something less than 40MB/s, Read Speed of up to 50MB/s, limited by our phone's Micro SD adapter, as in my PC via USB 3.0 adapters I get up to 90MB/s of Read and 80MB/s of write.
The card is standard formated in NTFS i think...
1. Format your 64GB SDXC to FAT32 on your pc.
2. Then insert it and your Xperia will detect your sdcard.
I used this card in my M2 Aqua: SAMSUNG 64GB MICRO SD EVO UHS-I CLASS 10 48MB/S (formated to fat32)
I took my sd card out to plug it into my pc with an adaptor so I could do some stuff with it but the pc refuses to read it, just says i need to format it! It's a sandisk extreme 128gb (which I believe comes pre-formatted and ready for use). I have a load of stuff on it which my phone can see perfectly fine, and i can access that stuff if i plug my phone into the pc. I just can't access it directly if I plug the card into an adaptor.
Could this be some sort of encryption done by the phone to the card causing the PC to keep asking me to format it as soon as I plug it in? I have *NOT* done an "encrypt sd card" on it so it can't be that. I dont know why else windows would not be able to read it.
What PC OS version?
exFAT formatted mass storages couldn't be accessed by some older OS's
themissionimpossible said:
What PC OS version?
exFAT formatted mass storages couldn't be accessed by some older OS's
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win10
Windows10 has included support for exFAT.
I suspect your Sandisk micro SDXC 128GB comes pre formatted in exFAT,
My Samsung Micro SDXC PRO+ 128GB was preformatted in exFAT and has its own SD adapter included.
If you're using an adapter that was included with the Sandisk micro SDXC, it's possible that the SD slot of your PC is not compatible with the SDXC specifcations.
In that case I'd try a microSD USB adapter.
themissionimpossible said:
Windows10 has included support for exFAT.
I suspect your Sandisk micro SDXC 128GB comes pre formatted in exFAT,
My Samsung Micro SDXC PRO+ 128GB was preformatted in exFAT and has its own SD adapter included.
If you're using an adapter that was included with the Sandisk micro SDXC, it's possible that the SD slot of your PC is not compatible with the SDXC specifcations.
In that case I'd try a microSD USB adapter.
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I am just using a tiny lexar card reader I must have had with an old lexar card, sd card goes in the little slot and it plugs straight into usb port. worked with my older sandisk 32gb card perfectly. maybe the reader is too old to work with the 128gb card.
I want to get a large microsd card (256gb or larger) and access it through a OTG USB card reader.
Does an unrooted Pixel 2 have/need SDXC support to read the card or does this all fall on the USB adapter having SDXC support? I'm guessing this is the case, but I can't really nail anything definitive on that.