The Supermicro 3.5" hot-swappable hard drive tray (MCP-220-00094-0B) is a great addition for those who would like to replace or add additional storage drives. This hard drive tray is compatible with CSE747, CSE938, CSE-F424. Each hard drive tray is validated to ensure quality. - 3.5" Hard Drive Tray - Hot-Swappable - Lightpipes to Support LED Indicators - Supermicro Certified