Accidentally deleted files from NAS

I was combining some audio files that were stored on my network drive late last night and when I finished I thought I deleted all the source files and left the finished product but when I came back to the computer today I discovered that I had left the wrong one. I tried recovering from the Properties window but it says “no previous versions”. I installed & tried Recuva and a couple of other similar programs but they can’t see the network drive so they don’t find anything.

Any suggestions?