If you want to delete photos from your Picasa auto backup, there are a few different ways to go about it. The first way is to use the Picasa web interface. On the main Picasa page, click on the photo album you want to work with. On the album’s details page, click on the “Photos” tab. Under “Auto Backup Options,” select the “Delete Photos from Auto Backup” checkbox and click on the “OK” button. The second way is to use Picasa’s built-in photo manager. Open Picasa and select your photo album. On the album details page, under “Photos,” select the “Auto Backup Options” tab and uncheck the “Delete Photos from Auto Backup” checkbox. Click on the “OK” button to save your changes. The third way is to use Picasa’s built-in photo editor. Open Picasa and select your photo album. On the album details page, under “Photos,” select the “Auto Backup Options” tab and check the “Delete Photos from Auto Backup” checkbox. Click on the “OK” button to save your changes. ..