Electronics > Projects, Designs, and Technical Stuff
SD vs SDHC
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NiHaoMike:
Licensing issues aside, I also remember reading that at least on Raspberry Pi, exFAT is significantly slower than ext4.

Maybe a workaround is to ship the product without the driver, then have the user download it during setup? But I suggest simply refusing to support such garbage if you can get away with it.

BTW, Android 6.0 devices have the option to reformat the SD card with ext4 in order to allow installing apps on it. Something to do with the file permissions, which neither FAT32 nor exFAT support to the required degree.
David Hess:

--- Quote from: Kilrah on July 29, 2016, 10:05:55 am ---
--- Quote from: voltsandjolts on July 29, 2016, 09:31:06 am ---It is disappointing to see the SD Card Association mandate exFat for SDXC which is yet another propriety and patented Microsoft file system.
Why could they not have used an open standard free for all to use

--- End quote ---
Name an open and widely implemented format that allows for those sizes and doesn't have a 4GB filesize limit? Oh, right...

--- End quote ---

UDF

But as pointed out above, no royalty free standard was going to be approved with Microsoft calling the shots even if they had to invent a new filesystem.  If UDF had been used, Microsoft would have made sure Windows did not support it on removable media.

As far as Windows compatibility, with Microsoft's continuing Windows 10 screw ups that is becoming less important as time goes on.
voltsandjolts:
Well, stone the crows.
Microsoft is making exFAT available for use in the Linux kernel.
https://www.zdnet.com/article/microsoft-readies-exfat-patents-for-linux-and-open-source/
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