This is a cover for USB-Sticks. i made one for mine and wanted to share.
one inside of one cover has an angle, so you can print it laying on the side without infill, which would mess things up.
I used the 64gb one, which looks slightly different from the pictures. https://www.banggood.com/de/128G-USB-3_0-Flash-Drive-Chip-Pen-Drive-Chips-3_0-General-Board-U-Disk-Chip-No-Case-8G-16G-32G-64G-p-1784120.html?rmmds=myorder&cur_warehouse=CN&ID=514256
it includes the 3d model of the stick for reference and a usb-plug-cover .
Depending on the printer you might need to print it a few percent bigger
Website used for the image: https://3dp.rocks/lithophane/