NAS backup Question

What file system are you using?

Not very likely. The drives are usually encrypted to the enclosure. But if you had another Synology NAS of the same model if will probably be OK. As far as the LMS it should be able to read from any NAS.

This was a concern I had when I looked at a NAS. As I understand it the Synology is one of the few NAS that does not use a proprietary file system. I wanted to be able to pull a drive from the NAS and put in in my external drive case if I wanted. Also a lot of NAS don't support the newer larger size drives.