Tried to format the USB drive as NTFS. Plugged it in, got the alert stating "A USB drive is connected.", and the minute I hit the green Start button, it gives me the error "Cannot detect a USB flash drive."
Tried formatting as exFAT from within Windows. Got the same exact messages as I did in attempt #1.
This has been working fine for me using exFAT on multiple different USB thumb drives for over a year, but today none work.
Tried different thumb drives, tried switching off a few times, and even pulled the plug out from wall and waited a while before reconnecting.
Model is MB5460.