This holder is a simple 30 - 5 minute print that you can stick onto your ender 3 pro to safely store a card reader. I printed mine in silk filament at .4mm nozzle size, and no support. Mine doesn't come out and has a bit of wiggle room. If any of you would like to see additions such as card storage please let me know or feel free to remix it yourself!
Ender3Pro_M.SD_Reader_Holder.stl | 48.5KB |