Differences include that the M does not work with the Dell D-Dock, and the case styling is slightly different. The motherboards, screens and hard drive caddies are all physically interchangeable. Slow internet speed on ethernet The hard drive is accessible through a cover on the left hand front side of the lower case and is secured by 1 screw. After removing the screw, the hard drive can then slide out. Latitude D[ edit ] The D released in was an[…]