Just used SaveACopy command for the first time and it is mind-bogglingly slow. 270MB file, saving to a NAS, normal save takes a little while (15 seconds or so), but this is pushing 2-3 minutes already with SaveACopy.
Anything I should look for in the file that could be causing this? I think it is a bit large due to some legacy textured meshes from scans, but those have been deleted and purged, however the file size is still a bit large.
Saving to network storage will never be as fast as saving local. Files end across a wire (or air) are packetized and a whole lot of checksums and security bloat are added. If it’s really slow, save local and then copy to your NAS using Explorer.
All network storage devices, including traditional file servers, have security, encryption, and compression settings. You might poke around and see what you are comfortable turning off. Otherwise, do as I suggested - save local, copy yourself.