Use this SIIG USB 2.0 Dual SATA HDD External Dock to give yourself a huge amount of extra storage space. You'll be able to use any SATA1 or SATA2 hard drive that you have as an external drive. This SIIG USB 2.0 Dual SATA HDD External Dock supports up to 2TB of storage, and connects to your computer via USB 2.0. With SATA 3Gbps HDDs, you'll even be able to hot-swap your drives. USB 2.0 Dual Bay Docking. Cool Dual SATA to USB 2.0 Docking station. Dual Bay external docking station with internal cooling fan for 2.