I created nFreezer ("encrypted freezer") for this purpose at the end of 2020: https://github.com/josephernest/nfreezer https://github.com/josephernest/nfreezer.

I created nFreezer ("encrypted freezer") for this purpose at the end of 2020: https://github.com/josephernest/nfreezer https://github.com/josephernest/nfreezer. Main features: * encrypted at rest locally (the data is never decrypted on the remote server) * handles file renames / moves (no data is re-sent, it can save GB of transfer!) * single Python file of ~ 250 lines of code. It is quick to read the code and decide if you like/trust it or not.