At one gigabyte, your best option is redundancy, not reliability. Put copies on a dozen cheap USB thumb drives and store them with friends, relatives, or just in a metal box out in the woods. Upload to Google Drive, OneDrive, and everywhere else that’s offering a free tier that’s large enough. Burn a fresh copy to a DVD-RW every weekend and stash it somewhere.

When you’ve got enough backups, it doesn’t matter if a few of them fail – you can always grab another copy and restore from that.

rsync over a wired network. That way, I can stop and resume at any time.