These days, hackers stays in a computer system for 5 or 6 months before making their move. So they can destroy your backups and put their virus on USB flash drives, and you won't know until that day comes. So if you re-use your USB flash drives, they can be bricked.
However, if you get a brand new USB drive for every backup, then that would probably work. Are do you purchase 365 USB flash drives per year (or however many backups you do per year)? But then, you will have to buy a new computer because if you try to use that backup on the old computer that is hijacked, that backup is compromised as well.
These days, hackers stays in a computer system for 5 or 6 months before making their move. So they can destroy your backups and put their virus on USB flash drives, and you won't know until that day comes. So if you re-use your USB flash drives, they can be bricked.
However, if you get a brand new USB drive for every backup, then that would probably work. Are do you purchase 365 USB flash drives per year (or however many backups you do per year)? But then, you will have to buy a new computer because if you try to use that backup on the old computer that is hijacked, that backup is compromised as well.