File originally saved to flashdrive, now won't save or let me close app

[Cassie R5FCA]

I had a file that I originally saved onto a flashdrive. I took the flashdrive out not thinking, and tried to save the file again and it said the save could not be complete. I was able to export it and get my work that way so no issue there. The isue now is I can't close that file or my Photoshop app. I can't even force quit it. It just says that photoshop will quit when the file is finished saving but of course, the file never saves. Anyone know how to fix this?

 

[Nancy OShea]

Re-insert the Flash stick into your USB drive.

[Cassie R5FCA]

I also tried this. That didn't work either.

[J453]

Can you hold down Cmd . (command period) until it stops?