How can thieves or ordinary hackers crack it?
I already showed you a link where someone cracked a fingerprint reader on a $1000 smartphone in 3 minutes. The fingerprint reader on a $20 USB drive will be trivial by comparison.
Thank you very much, o_ e_ l_ e_ o！ Thank you for your advice.
I seen that video, and known that the fingerprint U disks were not unbreakable.
So the handwritten documents corresponding to the unencrypted files on the USB drive, will not be stored at my home (off site backup).