I have a desktop system that utilizes Sata3 drives at 6Gbps. I encode MTS and other various compressed video files to DNxHD every time before I begin editing. My footage cuts like butter - even in a 3 camera multi-cam. My question is this: I also have a laptop (Corei7, Nvidia Geforce 960m, 8GB of RAM, etc. etc.) and am wondering if I use a USB3 external drive, if I could edit DNxHD footage in PP without a major speed issue? Also, what about a 3 camera multi-cam using DNxHD with a USB3 external drive? I am hoping to get some feedback on anyone else who has, perhaps, experienced this setup before I go buy hard drives that I might not need/want.