@edgren Thanks i will check on that (the online is for the "offsite") the usb key i ask is because i do host myself my password manager (vaultwarden) so i do need a secure way to store my encryption key (of my backup) and my id to access this offsite backup in case of total loss (all hardware).
@somegirlprivacy Ok. Yeah, Duplicity[1] will encrypt all your data before sending it to Backblaze so your data will be stored secured 🙂
[1]: https://duplicity.gitlab.io/