i have 2 computers, one connected my lan to a router and the other connected my wifi to same router. i am using a cat5e cable for speed of 100mbps to router. my wifi device is near the router too and offers connection up to 54mbps. i noticed that when transferring rate is very slow, about 3mbps between those 2 devices. how can i increase the transfer rate? i usually need to transfer large very files fast.