The TR-002 2-Bay USB 3.1 GEN 2 RAID Expansion Enclosure from QNAP is unique in that it allows you to expand the storage capacity of not only your QNAP NAS, but also your host Windows, Mac, or Linux system. Use it in this fashion as a DAS (Direct-attached Storage) and access its content simply by connecting it to your system using its integrated USB 3.1 GEN 2 Type-C port and the included USB Type-C to Type-A cable. The TR-002 features two hot-swappable 3.5" SATA drive bays that support 3.5" and 2.5" hard drives. The drive bays can be configured hardware- or software-controlled RAID 0 and 1 modes, each of which offers performance, data redundancy, or a combination of both. For those who do not require a RAID, Individual and JBOD modes are also available. The enclosure keeps cool using the 70mm fan.