Autosave will save in a special place.

If you've already re-opened the file, you're out of luck.

If not, open a blank Excel and go to file-Open and pick Recent Documents.
Then, hope!

"Mark W" wrote:

I closed an Excel file without saving b/c I Thought it was another file that
I didn't want to make any changes to. I had been working on the file for a
couple of hours and I have autosave. Is that autosave version still
accessible or was it erased as soon as I closed the file?