I have an early 2007, top of the line 17" MBP. About a year ago I noticed that some USB drives didn't like the right side of my computer. Now modern drives (like a Seagate 1TB GoFlex USB 2.0/3.0) won't load on the left side after boot or disappears after loading after boot (several hours later). If I connect a Staples POWERED USB hub and connect these drives everything works (so far). Can anyone shed any light on the situation?