SOS Online Backup is a leader in the online backup space. SOS runs quietly and automatically in the background. Both Personal and Family Cloud SOS accounts support an unlimited number of mobile devices. SOS is quick and easy. The product will automatically find important files, then simply set the start-time for a daily backup. SOS Online Backup supports any size and any file type. All SOS apps (desktop AND mobile) encrypt files using UltraSafe 256-bit AES before transferring them to the cloud.