Perkeep: personal storage system for life
I've recently started using Fossil[0] to archive all my personal data. It works rather brilliantly. Technically you can use any VCS but Fossil is unique in that the entire repo is a single SQLite db, so it's very easy to backup and restore. Not to mention the web UI to have a quick glance before checking out any files. Even better I can sync flawlessly between multiple hard drives and computers. I've a few separate branches for Docs/Photos etc. I checkout the related branch and just add more files whenever needed. After files are added to the repo, I just remove the working copy. There are some limitations though like files larger than 2GB aren't supported.[0] - https://www.fossil-scm.org/