exFAT support on macOS seems to have some bugs because my external drives
with exFAT formatting will randomly get corrupted.
Disk Utility is unable to repair this at first, but the fix is this:
- Use
diskutil list
to find the right drive id.
- You want the id under the IDENTIFIER column, it should look like
disk1s1
- Run
sudo fsck_exfat -d <id from above>
. eg sudo fsck_exfat -d disk1s3
-d
is debug so you'll see all your files output as they're processed.
- Answer
YES
if it gives you the prompt Main boot region needs to be updated. Yes/No?