The best solution I found as an alternative to an off-site copy is to set up a USB drive and something like a Raspberry Pi in my car. When I pull into the garage, the house server senses it and syncs new data to it. This can be supplemented further by having it auto sync to a computer in your office whenever you pull into work. Add in some monitoring so you can get a phone alert if any of the synced copies are more t…
how do you power the usb drive whilst it's syncing in your car, while parked in the garage? What if the drive gets stolen?
All data is encrypted before sending to it. If it gets stolen, well it is only one of the copies of the data (however it lives hidden under the dash, and is small enough that it looks like a piece of car equipment).