Privacy policy

proxmox-backup-sync — last updated 3 October 2026

proxmox-backup-sync is a private backup tool run by one person, Fabian Modig, on his own home server. It has no other users.

What it accesses

The application requests access to the Google Drive of the single Google Account that authorises it — the operator's own account. It uses that access only to:

• upload backup archives of his own server into one folder in that Drive;
• list that folder, to see which archives are already there;
• delete archives in that folder which newer backups have replaced.

It does not read, move or delete anything else in the Drive.

What data is involved

The uploaded files are backups of the operator's own virtual machines, containers and server configuration. They contain only his own data. No data is collected from any other person, and the application has no users other than its operator.

What is not done

• No data is collected, received or stored by anyone other than the operator and Google, as the provider of the Drive storage.
• No data is sold, shared with third parties, or used for advertising, analytics or profiling.
• There are no cookies, no trackers and no analytics on this site.
• No data is used to train machine learning models.

Credentials

The OAuth refresh token obtained during authorisation is stored in a file on the operator's own server, readable only by that machine's administrator account. It is deliberately excluded from the backups the tool uploads.

Retention

Backup archives stay in the Drive folder until a newer backup replaces them, at which point they are deleted. Deleted files follow Google Drive's normal trash behaviour.

Withdrawing access

Access can be revoked at any time from Google Account permissions, which immediately stops all further uploads.

Contact

Questions about this policy: fabianmodig@gmail.com