Google will delete Android device backups that are left inactive for two months with little or no warning. The discovery was made by a Reddit user who left a Nexus 6P backup in his Google Drive Backup folder for more than two months, only to later find it had been deleted by Google automatically. Google Support documentation appears to confirm the behavior. "Your backup will remain as long as you use your device. If you don't use your device for 2 weeks, you may see an expiration date below your backup. Example: 'Expires in 54 days.'" The maximum limit for device backups appears to be 60 days, or two months. The short expiration date on device backups is odd, given how freely Google offers online storage to its users. Google has not addressed the discovery directly.