Formatting a thumbdrive

Depends, Quick or Low level. The latter will take far more as it rewrites every sector.
 
Ok, I know you say NOT Quick, so I guess I'm doing a low level. Its been going for over 12 hours now so I'll let it go, thank you :)
 
Hmm; imo, KILL the format and restart it. If it can't complete in 8hr, it's trash.
 
After restarting it, it went for maybe 90 minutes/2 hours & I got a pop up saying Windows can't format that drive.Oh well. :)
 
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