exFAT is not the supported format. http://www.tp-link.com/en/faq-603.html

tp link 500mps units are powerline devices? Are you looking for range extender or powerline extender? http://www.tp-link.com/en/products/details/cat-10_TL-WA850RE.html...

Firmware version of your TD-W9980 is up to date? What's the ISP speed? When you get stable 70Mb/s down 18Mb/s up, can you login web interface and check line rate upstream&downstream? When speed goes...

Reset it to factory defaults and reconfigure it. If the problem continues, contact support team in India?

Brilliant! :)

Run the disk or download it from TP-LINK website. http://www.tp-link.com/en/download/TL-WPA281_V1.html#Utility About how to login, you can refer to "Configuring the Powerline Extender" in QIG....