They prompt me to format every disk I put in. After formatting, the format fails when it goes back to check.

Does anyone have any suggestions? All motors seem to be functioning properly and I have thoroughly cleaned the drives out and re-greased key points with white lithium grease. It seems to be a problem with the heads or circuit board.

MOST of my auto-inject drives are like this. They come jammed with dust bunnies, I clean them all out, and they still don't work.