i'm basically running that setup: rpi, external usb, encrypted backup.
- i'd recommend attaching an external 3,5 disk that comes with its own power supply, that way you don't have to worry about power, it's cheaper and you have more storage.
- For backup i am using borgbackup. it does encryption and deduplication. you can also backup several machines to the same repository if you want to. i'm using it for several use cases, it's rock solid, never had a problem.
- you can safely use borgbackup over ssh if you want to do remote backup. just forward the ssh port on your friends router and use dyndns if they don't have a static ip.
- i'd recommend attaching an external 3,5 disk that comes with its own power supply, that way you don't have to worry about power, it's cheaper and you have more storage.
- For backup i am using borgbackup. it does encryption and deduplication. you can also backup several machines to the same repository if you want to. i'm using it for several use cases, it's rock solid, never had a problem.
- you can safely use borgbackup over ssh if you want to do remote backup. just forward the ssh port on your friends router and use dyndns if they don't have a static ip.