As a (previous) customer of Proton from many years and a user of their drive product, you should be aware that earlier this year the drive API endpoints began to block their own VPN egress quite often for rate limiting. They also block many cloud provider’s egress. They also don’t officially support rclone, and their changing API spec often breaks the compatibility.

I saw the writing on the wall and migrated rapidly earlier this year ahead of crypto product launches ahead of the email fiasco. It was hard to get data back out, even then.

Proton still stands for privacy. But the dark patterns for lock-in I can do without.

Hetzner Storage boxes with rclone and the “crypt” option are a drop-in replacement, at ~$40 for 20TB. That’s where I went instead.