I got this problem probably every 10-15 days ever since I started using Unraid and finally remembered to capture the logs before I resolved it again.
Basically, seemingly randomly, often exposed via performing an update of the plugins, the Flash drive gets reported by Unraid as unreadable or corrupt.
I then take the flash drive, chuck it into a windows PC, windows says it needs a repair, it performs the repair but doesn't find anything wrong, then I boot unraid again and carry on for the next block of time.
Flash Drive: Strontium Ammo 3.1 USB Flash Drive - 32GB
Datasheet: http://strontium.biz/wp-content/uploads/NITRO-AMMO-USB-3.1-Product-Datasheet.pdf
I have another of the exact same drive but I don't want to waste transfers, not really sure where to go from here.
Logs attached
kitsune-diagnostics-20220324-0919.zip