Privacy

I'm not sure i see the point of that as a product. Tuta mail makes sense because e-mail is genuinely hard to setup and get verified against (most of the time you'll get flagged as a bot if you self host). But a drive, really?

All it takes is a couple of old drives in raid 1, bonus points for a proper NAS distro with ZFS and you're up, a simple wireguard to get access anywhere along a free DNS url and you're all set, you don't need to trust anyone over files, even as a remote backup the actual service doesn't matter if you deeply encrypt the backup file.