Trying out my new AX5400 Pro I stuck a USB 3.0 memory stick into the port on the router and can see my files (several large MP4s) on various Windows PCs that I've tried. But when I tried to copy one of the files -- about 3GB+ in size -- from there to my Surface tablet, the transfer was painfully slow, going along at <500KB./sec and with an estimated completion time of 50 minutes! Considering the wifi speed this is really unacceptable to use for copying these files that way. Can it be speeded up?

Interestingly, the transfer speed was fast enough if I brought up the media player and played the MP4 at the filmed speed. But that's not what I wanted to use the file sharing feature for.