On the outside is a very stable plastic, which hardly can be pressed. I have no doubts that something pressed into my shoulder bag on my hard drive.
The zipper is covered very smoothly and with a plastic lip, so it is probably protected against some splashing. Included is a small carabiner, but I suppose that no one would hang up this bag.
On each of the insides of a network attached to the hard disk or accessory is to be fixed. Furthermore, the bag is sufficiently padded. I am usually very picky with my instruments, especially in sensitive hard drives, but here I have no doubts that something would happen.
Unrestricted buy recommendation, since even smaller disks can be safely stowed and still has enough space for accessories; or 2. a plate) at that at that price the possibly best option.