I have a user that saved an Excel document but mistakenly deleted useful

Is it possible to go to tape to restore the version from a couple days ago?

All I've seen so far is how to restore the latest version, how can I get an
older copy?

Is the only method to restore that library (which is separate from PO)? If
this is the solution, can I do it without interrupting that PO and its

I'm concerned you're going to tell me to shutdown the PO, rename library's
storage area, restore copy from appropriate date, bring up PO and get your
file, then bring PO down and return library to its up-to-date folder. Is
this how it's done, would this even work? Well, I hope not, that would mean
interrupting a couple hundred users just to get to an Excel doc.

Thanks for any help,