You don't need a RAID. Just have 2 hard drives and copy stuff from one folder to another. Click skip all for identical files that already exist. I've had jelly

You don't need a RAID. Just have 2 hard drives and copy stuff from one folder to another. Click skip all for identical files that already exist. I've had jellyfin serving my music, family videos and youtube rips (e.g. university lectures) for years. Haven't had to touch it since I set it up. I just plop files into folders and it picks them up. I got a lot of family videos from my mom, who keeps them on her computer plus an external hard drive, which she brought to me to copy. Copying files to USB drives as a backup and sharing that is pretty understandable for non tech people.