Backup files from OS volume cannot be copied from my NAS

Whilst I’m considering having to switch device…

I recently made a backup of my transmission client, basically just went in via ssh and copied the directory from the OS volume to my public folder. Backup is fine. I’ve even had to restore it once, and that was as simple as copying it back.

Only problem is, I can’t get these files off the NAS. I wanted to stick them on a thumb drive. Or at least on my laptop. Tried zipping them, the works. Not having any of it. Any ideas?

And a very stupid n00b question. Is the OS volume a partition of one of the physical drives, or is it on the NAS itself?

Cheers all