Screw it under your desk to hold your power brick. You have to slide the power brick in, it doesn't just pops in, the size of my power brick is ~ 46mm x 30mm.
It prints without supports lying on the side.

power brick mounting bracket.stl

You can screw it behind your desk and it can hold any cable

cable organizer.stl

It can hold 2 SD or micro SD to SD adapters and 10 micro SD, when the cap is on they can't move around and they will still be in place when you open it. The cap can be screwed on.
It's my first try to model something to print in 3d. I updated the models and I have now fixed all the problems.

Screwable portable sd and micro sd holder

It can be printed in any material, the weight depends on material and infill

portable SD holder base.stl

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power brick mounting bracket.stl

cable organizer.stl

Screwable portable sd and micro sd holder