I have a X55 on the way, I want to add a 2.5" disk but would like to know the max height that fits inside the case. 2.5" disks range from 5mm to 19mm, I'm considering a 4Tb disk that is 15mm.
You can use a 15mm drive (3 to 5tb) if you use some form of bodge
to rise up the x55 a few mm & are careful with its placement, also make
sure the metal on the drive don't short out the internals components!