Support 4 storage modes: The expansion adapter board supports Windows 8.1 64-bit professional version and above systems of desktop computers, forming four soft RAID storage modes. LED monitor indicator: When the power is on, the red light is always on, the blue light is flashing when reading data, the blue light is always on when not reading data, and the working status of the hard disk is monitored at any time. Support multiple systems: Multi-system compatible, support hot swap, plug-and-play without driver.