Right Side; Left Side - Asus Transformer Book T300FA E-Manual

Right Side

USB 2.0 port
This USB (Universal Serial Bus) port is compatible with USB 2.0 or
USB 1.1 devices such as keyboards, pointing devices, flash disk
drives, external HDDs, speakers, cameras and printers.

Left Side

USB 3.0 port
This Universal Serial Bus 3.0 (USB 3.0) port provides a transfer
rate of up to 5 Gbit/s and is backward compatible to USB 2.0.
ASUS Transformer Book E-Manual
21