external HDD mount for e.g. TV

I was looking for a good place to store my external HDD for the TV. So I came to the idea to fix it behind the TV on it wall mount.
It can carry HDDs up to 80x20mm. I designed two lids in diffrent height to close the box.
To mount it on brakets, you will need screws with M6x35mm or M6x40mm
To fix the lid, I was using screws in M3.