Indicated are 16 x 12 x 3 cm (somewhat optimistic) and measured at me arise 17 x 13 x 3.5 cm and thus a deviation of 1 cm in almost all directions. This pocket acts insanely tall order in a 2.5 "hard disk to accommodate (see also my discontinued product photo). The dimensions fit rather for a 3.5" drive and make the small 2.5 "so the Giants ... Add terms of mobility not just the optimum you need room for 2 hard disks + accessories;. If you then access, like me, are looking for a shell around the small hard drive to pack too small, so there is certainly far more compact alternatives!
Protecting any case, in my opinion well, the material appears well made, tough and impact resistant. Only that the loaded disc in all directions has a good 2 cm square to make exits is certainly not ideal! The bag smells but very intense and uncomfortable, so you wonder whether the whole thing is hazardous to health ...