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SanDisk 128GB microSD card

I read somewhere that the SanDisk 128GB microSD card is technically only compatible with the Samsung Galaxy S5, but is there anything to stop it working with an HTC One M8 for example?

Most Useful Answer CTPAHHIK  Apr. 16, 2014 at 09:45

I found that all cards will work with all phones with appropriate software support. All my card readers are able to read SDXC cards, when they were released with only SDHC support.
You need to check which file system phone will support and not which card. SDXC cannot use FAT32, which is default file system for all storage under 32GB.

SDXC must be exFAT, EXT3/4 or NTFS. Google which one your phone will support.
exFAT is new Windows FAT32 extension and usually most common one to be used. It's supported by Windows and some Linux distributions.
EXT3/4 is Linux file system and supported by all phones, but not supported by Windows. If you have SD card formatted as EXT3/4 Windows will not be able to access it.
NTFS is Windows proprietary format and usually not supported by anything but Windows. You can read data from NTFS file system, but cannot write it unless using Windows.

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matt101101 / MOD  Apr. 16, 2014 at 00:31

It'd probably work, the M8's spec sheet was most likely written up prior to 128GB cards existing and no-one bothered to fix it. 256GB cards will likely work too when they're eventually released.

CTPAHHIK  Apr. 16, 2014 at 09:45

I found that all cards will work with all phones with appropriate software support. All my card readers are able to read SDXC cards, when they were released with only SDHC support.
You need to check which file system phone will support and not which card. SDXC cannot use FAT32, which is default file system for all storage under 32GB.

SDXC must be exFAT, EXT3/4 or NTFS. Google which one your phone will support.
exFAT is new Windows FAT32 extension and usually most common one to be used. It's supported by Windows and some Linux distributions.
EXT3/4 is Linux file system and supported by all phones, but not supported by Windows. If you have SD card formatted as EXT3/4 Windows will not be able to access it.
NTFS is Windows proprietary format and usually not supported by anything but Windows. You can read data from NTFS file system, but cannot write it unless using Windows.

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