You can set up a pretty robust backup system for pretty cheap if you already have the drives, and the knowledge to set it up yourself. I have two always on devices, an NAS that is my central location for important files, which syncs to a backup device with two hard drives that are synced at different intervals. If a drive fails, it gets replaced, and I haven't lost the core of my backups, I might lose some incremental backups, but it's more important to me that I have 3 copies available on different drives. 2 are in one location, the third in a separate location and my syncs are each an interation behind, so if there's a huge screw up, it'll take three sync cycles before the main copies are lost (not including the incremental backups I also keep).

This setup allows you to replace drives as they fail so you can constantly update with technologies and don't need to worry about what's the best medium.