Seagate has always offered up big drives that store your stuff reliably, and the newest round of external storage devices—Backup Plus Slim—will now back up content from your phone.

As far as hardware specs go, Seagate's new line of Backup Plus external drives are pretty straightforward—storage ranging from 500-gigabtyes to 4-terabytes)—but the one neat thing about this drive is that the included file management software will not only schedule backups for you, but it will automatically upload and…