I have recently bought a Netgear Nighthawk R7000 wifi ac router with 1 USB 3.0 and 1 USB 2.0 port. Upon connecting my WD mypassport 1TB USB 3.0 HDD with the USB ports gives me 3.93mbps of transfer rate. is it normal?? I expected atleast 50mpbs+ of transfer rate. And for some strange reason transfer on USB2.0 feels faster than USB 3.0.
I copied a 637mb file from my laptop (wifi N) over wifi to and from the router. Following are the results:
From laptop to router time: 2 mins 35 secs
From router to laptop time: 1 min 35 secs.
Sure, and of course like any wireless signal it will degrade over distance, check you speeds at 2 meters and 20 meters. If they drop off substantially then you are not using AC only mode or you have a lot of interference/bad building materials. You mention using N, you will not get much more than what you already have over an N router unless you either get it an AC adapter or place an AC access point nearby and re-broadcast the N.
Download and run the free wifi analyzer inSSIDer on your laptop from http://www.metageek.net/products/inssider/" target="_blank"> to see your 2.4 and 5GHz signal strength at various locations -- look under the Network tab. If you find spots of poor coverage that would be the place to add an AP.