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File System for MicroSD card

FAT32 is the default. The biggest issue is there is a 4 GB per file limit with this file system.

Because of that, I use NTFS.
 
When I got may Sandisk 64 it came formatted as exFat. This will allow transfer of more than 4 GB. Reformated in phone and phone formatted it as exFat also.
 
Some tablets and devices can't read exFAT so I've learned to just stay away from that. But, to each his own :)
 
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