I'd like to be able to wirelessly transfer large folders of photos/videos from my MBP to my iMac quickly. I'm currently transferring a 4.23GB folder and it is taking 30 minutes. I pay for 100MBPs cable internet and I am using an Airport Extreme AC. 1. What determines networking speeds? 2. Is there anything I can do to improve the speeds? 3. Does distance from the Extreme to my Macs make any difference when transferring between Macs? Thanks.