Pika Backup? https://apps.gnome.org/de/PikaBackup/
If you have a central server which is performing backups, and the client computer trusts the server, use syncthing to mirror the files on the client to the server. Syncthing also has an android client.
If the client computer doesn't trust the server, for example you are offering a backup destination for friends or extended family, then use duplicati for incremental encrypted backups.
Both options work on both linux and windows.
Self-Hosted Main
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
For Example
- Service: Dropbox - Alternative: Nextcloud
- Service: Google Reader - Alternative: Tiny Tiny RSS
- Service: Blogger - Alternative: WordPress
We welcome posts that include suggestions for good self-hosted alternatives to popular online services, how they are better, or how they give back control of your data. Also include hints and tips for less technical readers.
Useful Lists
- Awesome-Selfhosted List of Software
- Awesome-Sysadmin List of Software