Why my AS-U2.5G not having properly transferring speed when connectin to USB Type A adapter?
Certain USB Type-C adapters exhibit an issue where plugging in a device a certain way will reduce USB speeds to 2.0 levels. Unplugging the device and flipping it should result in full speed USB operation and 2.5-Gigabit Ethernet.
https://www.asustor.com/product/AS_U2_5G