@Kevin_Z The Client mode description in the manual does not mention using the USB port to host a USB drive. 

Do you know that it will do it? 

And is it fairly easy to configure it to do it? 

I just tried getting a GL-iNET OPAL, which is a similar product to do it.  Never could make it work.  I had several guys offering suggestions through the GL-INET forum page.  Maybe with enough networking expertise and intimate knowledge of the device it could have been accomplished.  I put hours into it without getting there.  I'm an electrical engineer with 42 years experience.  I'm not a networking expert, but know more than most people about it.  So I'm considering getting a TL-WT902AC to try it there.  But would prefer to have some confidence that it can be made to do the job without too much trouble.  In my opinion, it should be rather straightforward on a device like this -

1) Get the TL-WR902AC WiFi system connected to your home WiFi.

2) Plug in the USB drive.

3) Turn on USB file sharing with permissions.

4) Set up file sharing password.

5) Access the USB file structure via IP address from the Windows computer on the same LAN.

None of the above steps should be that difficult.  I gave up trying on the GL-iNet OPAL.  Nothing was working, and there were all sorts of highly technical things needed to be done which weren't mentioned in the manual.

  @Kevin_Z   Thank you for the info.  The section in the user manual which you pointed out does seem to imply that it should work without too much problem.  I will give it a try.

DSPGuy