You now have to back up your USB drive before you try to recover anything. You can do this in Disk Drill. Go to Extra Tools, then select your corrupted USB drive, and select Byte-to-Byte Backup.

Choosing the right USB port helps ensure your flash drive works reliably, and a few simple tweaks on your computer can further improve performance.

That drawer full of old USB drives may look useful, but think twice before reusing them, as some tasks become far riskier ...