restic (if you need deduplication, snapshots, encryption, etc, which it doesn't sound like you do), or rclone, to BackBlaze or rsync.net. I use the latter and a

restic (if you need deduplication, snapshots, encryption, etc, which it doesn't sound like you do), or rclone, to BackBlaze or rsync.net. I use the latter and am very happy, I've never used the former.