Just happens one of my clients wanted to make use of what seemed like dead wall space in an area where storage would be a real asset. The area below this glass display area is the chosen target for DESTRUCTION!!!!!!!
First, got to see if the space is free of pipes, probably the biggest deterrent to cost effective storage. This area backs up to the garage and there are lower cabinets in the garage against that wall. With no back! YES!! Tap for studs within the garage cabinet cavity behind the area targeted for DESTRUCTION, cut 8" x 8" hole with jab saw, exercising caution not to inadvertently cut into a tightly stretched electric wire and doing my best to save in perfect condition, my presently being cut sheetrock patch. . It was clean in there and other than the usual wire and ill placed studs it was good to go.