exFAT support on macOS seems to have some bugs because my external drives with exFAT formatting will randomly get corrupted.
If Disk Utility is unable to repair, consider trying this:
- In Disk Utility, ensure that the drive is not mounted, eject it if it is mounted.
- 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>
. egsudo fsck_exfat -d disk1s3
-d
is debug so you'll see all your files output as they're processed.