The Iomega Professional has an eSATA interface designed for speed. It makes the Iomega Professional ideal for consumers who need to use their external hard drive frequently, not just to back their system up occasionally. For those who want speed and don't want to have to remember to run the backup, the Iomega Professional comes with EMC Retrospect and MozyHome software designed for handling every day backup and disaster recovery needs. It also comes with Iomega Never Down software that is designed to create a safety net for system files by running a complete backup of the operating system, applications, personal settings, and data. The Iomega Professional is compliant with the new eSATA standards, making it more reliable than other devices might be.