Hmm I had another crack at this, but after I try to mount the drive from the rclone command line, it sits there for ages and does not complete. 😞

I tried mounting and it seems to work (gets a green light) but then a backup errors.

"taskId": "2441", "errorMessage": "Unable to chown:ENOENT: no such file or directory, chown '/mnt/backups/snapshot/app_21c3ed5d-24b5-46a7-afd9-874c5e23e2c8.tar.gz'", "timedOut": false, "backupId": null

All tips / ideas appreciated.