Formatting your USB permanently deletes all files. There is really no working method to recover those files. Always be prepared to back up your files next time.
I've run into this problem a few times over the years. You can try plugging it into a different PC and hope for the best. Otherwise, I've never found a solution that's worked.
Formatting your USB permanently deletes all files. There is really no working method to recover those files. Always be prepared to back up your files next time.