[b]WARNING[/b]64GB SDCard & Encryption Don't Play Well Together
I was recently trying to help someone out that had questions about encrypting the SDCard, and have come to the conclusion that Samsung did not test this feature appropriately. It's certainly possible that what happened to me was an isolated incident, or some fault of my own, but based on my testing I don't think that's the case.
Scenario: I have a SanDisk 64GB UHS 1 SDCard that's been working fine since July. I originally formatted it in the phone (which causes it to be formatted as exfat)Attachment 46823I followed the process to enable encryption on the SDCard and during the actual encryption process I received an error: 'SD card blank or has unsupported filesystem.'Attachment 46827So I turned off encryption and received the (well known) "SD card damaged. You may have to reformat it." error.Attachment 46826All attempts to reformat the SDCard in the phone have been unsuccessful - the card either doesn't show up at all (so it can't be mounted) or it just shows the same "Damaged SD card" message.
So, I shut down the phone and put the SDCard in an adapter connected to my PC. Attempts to clean/repartition/reformat the SDCard have been unsuccessful - all I have now is a useless piece of silicon/plastic.
Just so you don't think I'm totally incompetent, I've enabled encryption on 16GB and 32GB SDCards with no issueAttachment 46829Attachment 46830The difference seems to be that SDCards less than 64GB are formatted in the phone as FAT32, but 64GB SDCards are formatted as exfat, which is probably the "unsupported filesystem" - would have been nice if they'd shown an error BEFORE attempting to encrypt it, rather than after screwing it up.
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