Fusion Spare Tray (Black) ENC-SATA-TRAY2 A Little Extra Storage Whether you use Fusion storage systems to perform incremental backups or swap out large amounts of data, its always handy to have extra drives around—simplify the swapping by mounting those extra drives to spare drive trays. In seconds instead of minutes, you'll hot-swap your way to greater productivity! Compatibility • Fusion D400, D500, D800, R400, and R800 storage systems.* *Note: These drive trays are not compatible with Fusion 400 part numbers ending in DT4 (ie. ENC-SATA-DT4).