

Yeah, that’s a clearer way of saying it. I usually think of the highest quality commercially available version as being lossless, since the raw files or negatives are almost never accessible to the public (wouldn’t that be awesome??). But yeah, every DVD/Bluray is still technically just a disc with lossy video files that the studio encoded.
I like freefilesync for one-off synchronizations, mostly because of the super-simple UI. If I need to quickly make sure a folder on two drives are identical, I go to freefilesync.
For everything else, I use syncthing. I use it to keep files synchronized between my PC, tablet, and phone. I use it to sync Obsidian, as well as KeePass so my passwords are accessible across my devices.
Sounds like syncthing is probably more robust for your purposes, though its default behavior is continuous sync, you might need to do some extra configuration to strictly run it on a schedule.