Comes with USB-C Adapter. LED light indicates Power and Activity status. Hot-swappable, Tool-free HDD Installation, plug and play, no drivers needed. USB 3.1 high-speed supports up to 10Gbps data rate. Connect a 2.5in SATA hard drive to your computer using a portable cable with UASP Support. (USB 3.1 TO SSD" or "SSD TO USB 3.1" means the same thing and has the same functionality. This is an adapter that enables customers to connect their hard drives to a PC via USB 3.1 and it can be viewed as connecting the USB TO THE SSD or THE SSD to the USB. It is the same exact function).