Hello - I work for a company that recently bought a Mac Pro to mainly edit videos. As I have began editing on it, it has gotten progressively slow. To the point where it has trouble playing back simple edits. I am not great with computer specs and such, but I believe it should be running much more efficiently than it is currently. Attached is what I am operating with. I have tried turning off background render and quite a few other suggestions as far as speeding up the process. I will note that I am importing libraries, events and all media to an external. It is a LaCie Dual Thunderbolt 2. I have gone through 2 firewire connections and now it is connected via USB and has been fine other than speed. It has been slow regardless. Is something with transferring to the external the issue? I am lost. Thanks.