Recently I upgraded my 4th gen Time Capsule to a new Airport Extreme 802.11AC. My problem is that I do not get typical ftp download speeds when using the new AEAC router. I don't experience any slow downs with standard/web port 80 traffic. When using the original Time Capsule, I get average ftp download speeds around 4 MB/s (both wired and wireless clients). When I attempt to use the new AEAC, ftp speeds max out around 100 KB/s. I have attempted to export/import the working TC's settings to the AEBS and I still get the same slow ftp speeds on with both wireless and wired computers. I have tried everything I can think of to get 'normal' speeds on the new router and have had zero luck. I have tried: Changing between 2.4 and 5 GHz bands Changed between different (non overlapping) channels Removed wireless security Tried setting the channels on both bands manually as well as automatically Tried the same as well as different SSIDs Removed all network clients except the testing computer (mid 2014 macbook pro) Network: I have my centurylink modem in bridged mode. I use my AEBS for ppoe/nat. I have no issues authenticating and connecting to the internet for either router. I have no issue with drops in connectivity. Basically, I only have the one problem... the only way I get the full 4 MB/s ftp download speeds is if I bypass the newest AC router. I believe I have isolated the issue to the new router. If I remove it from the network, I get 'normal' ftp speeds. I believe I have tried just about every combination I can within the Airport Utility to fix or remedy the issue I am experiencing.