immich/docs/docs/partials/_mobile-app-backup.md

1. Navigate to the backup screen by clicking on the cloud icon in the top right corner of the screen.

<img src={require('./img/backup-header.png').default} width='50%' title='Backup button' />

2. You can select which album(s) you want to back up to the Immich server from the backup screen.

<img src={require('./img/album-selection.png').default} width='50%' title='Backup button' />

3. Scroll down to the bottom and press "Start Backup" to start the backup process. This will upload all the assets in the selected albums.