Thanks for your reply. I should have been clearer about what happened.
In my case (unlike the other poster), I hadn't downloaded the file. It was a Word file that I'd been working on for a considerable amount of time. As such, the file was named, and saved in a folder. I regularly save as I work too.
The problem has happened twice now.
Both times I saw that the file was renamed to something like 'work word file d_4'. That wasn't what I'd saved it as. This seemed odd to me.
So I would save the file AGAIN.
In both instances, after the save, I'd look and found that the file would completely disappear from the folder. It also would not come up in any spotlight searches. It just vanished. I checked for both the original file name and the one that magically appeared.
However, I would see the original file name under the Word tab, recent files. When I would attempt to open it, I'd see the same message as the original poster: "This document is either deleted or not currently accessible."
Older versions of the document which appeared in spotlight would open and show zero text, 0 kbs.
This problem is beyond odd. It's also frustrating to express because everyone seems to think I failed to save or did something on my part to cause this, as evidenced by your response as well as the other reply to the original poster. I've never experienced
it prior to a few days ago. I just want to identify the problem and ensure that it doesn't happen again.
(Luckily the second this happened I'd copied and pasted all of the text into a completely new file and emailed it to myself as a backup.)