I don't want to sound like a lamer but can't this basically be done with ssh and rsync? I've been storing and fetching files from my home cubox with a setup like this.

While I'm away from home I use a usb-stick with a custom dev envrionment all set up. Then just backup and fetch files from there as needed. Something like this gets the job done: rsync -avze ssh ~/my/backupfile user@(home ip address):~/backup/location

Probably a bit weird to understand but this is just one example command for backing up a local file (there are more advanced options too).