Effective storage expansion with RAID Support The TR-004 is an ideal storage expansion solution for PCs especially for laptops which lack the ability to install larger higher-capacity drives. Featuring four 3.5-inch SATA drive bays and supporting RAID configuration the TR-004 provides the ability to store a vast number of files and data and to ensure protection against potential drive failure. The TR-004 USB 3.2 Gen 1 RAID expansion enclosure allows you to expand the capacity of your QNAP NAS and PC.