Hi,

What is the operating system of your computer?  How did you install the driver? Use the CD ROM or download it from the official website?

What is the current hardware version of the T2UH? Below is the instruction to find it:

https://www.tp-link.com/support/faq/46/

How far away between the computer and the main router? What about the wifi signal strength? 

With your computer connected to the wifi, please check the wireless negotiation speed. Instruction as below:

https://www.tp-link.com/support/faq/2265/

Besides, you can refer to the instruction below to do further analysis.
https://www.tp-link.com/support/faq/709/  

Any updates, just let us know. 

Good day. 

I have the opposite with my T9UH - fast downloads from internet and local servers, but when I move files from my PC to the servers, the speed is a fraction of the download speed. I'm at a loss as to how to remedy this. Anyone have any ideas? I'm thinking about connecting to the router via powerline adaptors.

Thanks,

Michieux

@Michieux 

What is the current network topology? And what are the download/upload speed? 

With other devices connected to the router's wifi, what about the speed you get? Both download and upload. 

Try to reinstall the driver and change another USB port, and you can adjust the wireless settings of main router.

Hello, and thanks for your response. As it turned out, a reboot of our NBN box and our router resolved the issue; in fact, speeds are faster than before.