Srarna will automatically back up any albums in your native photos app that you select for backup.
Srarna runs in the background, and any new photos added to these albums (or any photos in these albums that were modified) will be automatically synced to Srarna.
You can choose which albums should be backed up when you sign up for Srarna. If you change your mind later, or if you create a new album in your native photos app that you also want to back up, please use "Settings > Backup > Backed up folders" to modify your choices.
If a file is deleted in your native photos app, it will still show up in Srarna. This is because on both iOS and Android, apps are not allowed to automatically delete user photos without manual confirmation.