Up to 5GBps Transfer Rate: Ugreen USB 3.0 to SATA adapter supports UASP Transfer Protocol, 70% Faster than traditional USB 3.0 and 80% reduction in required processor resources, which enables you to utilize the full potential of your SATA III SSD/HDD. When paired with a UASP-enabled host controller. The UASP Transfer Protocol only can accelerate read and write speed of SSD hard disk. Compitable for 3.5 Inch HDD. Ugreen USB 3.0 to SATA 15+7 pin connector cable allows you to connect any standard 2.5" and 3.5'' SATA HDD mobile enclosure to your computer/laptop. Please be kindly noted that 12V/2A center positive polarity power adapter (Power Adapter is not included) is necessarily required if 3.5" SATA HDD is connected. Wide Compatibility: Ugreen USB 3.0 SATA hard drive adapter is compatible with Windows 98/2000/XP/Vista/7/8/8.1, Mac OS X. UASP is a transfer protocol, requiring your operation system is Win 8, Win 8.1, Win 10, MAC OS 8 or above.