I have a usb 3.0 stick that works on my TCL Roku r617 tv..but it doesn't work on my newer TCL r646 Google tv.

I tried using a usb 2.0 extension cord (cos my usb 2.0 stick works on the r646) but that doesn't work either..I've tried every format and seems none of them allow the stick to be detected

Would a powered USB extension port work? I really want to be able to download large files over 4gig and have to use exfat on my usb 2.0 stick just to use the usb stick on the tv..crazy how my 3 year old Roku TCL has no issues! Thx for any help