Is using Syncthing for this not an option?
and set the ‘exterenal’ (at the friends house) device as ‘untrusted’
as shown in this video:
would this provide me with:
-off site backup
- encrypted data (person with full access to the offsite device can not read the data)
(password is not stored on the device?)
so when my house would burn down or anything and lose my NAS / Laptops/..
I could recover the data by using a new laptop, installing Syncthing on it, and connect it with the off site nas running syncthing (so i would just need the password) and i would be able to recover al my data?