A simple yet effective grip for your SD card.
The SD card is recessed by 6mm and should still fit every typical card slot.
I tested these with my laptop, an external card reader and the standard LCD 2004 – all fine.
Regarding tolerances you have two options: Close fit (+0.15mm) and press fit (+.05). I suggest printing both.
In order to find the perfect fit for a printers setup you could as well just print a bunch of these with differing Y/X-scalings like +5%, +10%, ...
The micro SD card version was requested in the comments and is still work in progress.
The card is recessed by only 1mm [and open on one side (*_glue.stl) to fit adapter cards and most card readers]. This should fit an Ender 3 but wasn't tested yet. The tolerances on the non-glue press fit version are a bit tighter (-0.05mm) as in the normal SD version, to compensate the smaller recess.
Let me know what you think

3D Printers