How can I use ibi to free up space on my mobile device?

You can use ibi to back up all the files on your mobile device. After you've enabled auto backup, and the backup has completed or uploaded content to your ibi, you can delete them from your phone and free up space to take new photos & videos. Newly added content will auto backup to ibi if auto backup is enabled. For more detailed information, please see How does auto backup work?