The easy-access interior of the Mac Pro feels like the well-organized workstation it is. No rat's nest of components here. You don't need to turn the system on its side or struggle to reach into awkward spaces to make changes. Just remove the side panel for instant access to everything. Slide out the processor tray to add memory. Slide out drive bays to add storage. Slide a simple bar to change up to four expansion cards at once. And with plenty of I/O ports both front and back, you'll have room for all your external devices.