The CRU RTX800-TR Thunderbolt portable RAID tower offers 10 Gbps performance with a dual Thunderbolt interface. The RTX800-TR houses eight 3.5" SAS or SATA hard drives, providing large storage for video editing, visualization, simulation, high-capacity storage, or backups of large amounts of data.CRU TrayFree bays make adding drives effortless: simply open a drive bay door, slide the drive in, and close the door. No screws, no trays, no tools. The rugged TrayFree bays are rated for over 25,000 insertion cycles.