M5Stack Cardputer Gridfinity 3x1 — 4 microSD + 2 SD

A compact Gridfinity holder for the original M5Stack Cardputer K132, with storage for four microSD cards and two full-size SD cards or SD adapters.

The Cardputer stands on its long, thicker edge next to the screen. This keeps the holder to a 3×1 Gridfinity footprint and makes the device lower than a holder that rests it on its short edge. The enclosed rectangular body has a continuous rim and chamfered slot openings.

Features

• 3×1 Gridfinity footprint, 42 mm grid spacing.

• Four microSD slots and two full-size SD slots.

• Raised microSD shelf so the smaller cards remain easy to grip.

• SD slots centered on the opposite end shelf.

• Optional pockets for twelve 6×2 mm magnets.

• One-piece print; no assembly required.

Fit and orientation

Insert the Cardputer vertically, with the long, thick screen-side edge down. The keyboard side remains above the holder. This is a storage holder, so part of the screen-side face sits inside the pocket.

Holder dimensions: 125.5 × 41.5 × 35 mm. Total height with the Cardputer installed: approximately 61 mm. The device pocket is 85 × 20.7 mm, allowing approximately 0.5 mm clearance per side around the nominal device envelope.

Designed for the original Cardputer K132, without a case or attached cables. Other Cardputer variants have not been verified. This holder does not provide a stacking interface above the installed device.

Printing

Printed successfully on a Bambu Lab printer in PETG using the slicer's default settings. The printed fit was checked with the device.

Print with the Gridfinity feet on the build plate, at 100% scale. Check the layer preview around the narrow card slots before printing. Magnet pockets are optional; the holder works without magnets.

Files

• STL: ready to import into a slicer; dimensions are in millimetres.

• 3MF: geometry with millimetre units, without a printer or filament profile.

• STEP: editable CAD geometry.

Gallery images supplied with the files are CAD renders, not photographs of the printed part. Hardware, cards and magnets are not included.

Credits and licence

Inspired by M5Stack CardPuter Insert for Gridfinity by DonFG. This version was rebuilt as a parametric 3×1 holder, with a different device orientation, an enclosed body, and dedicated SD/microSD storage. The original download identifies its licence as CC BY-NC-SA; its notice is retained with the source.

Device dimensions were checked against M5Stack's Cardputer documentation. Gridfinity is the modular storage system created by Zack Freedman. This is a community accessory, not an official M5Stack product.

This release: Creative Commons Attribution–NonCommercial–ShareAlike 4.0 International (CC BY-NC-SA 4.0). Credit the creator shown on this listing and retain the source attribution when sharing adaptations. Licence terms.