Here is a step by step how-to for preparing the Cohesion3D Mini microSD card with the correct firmware and configuration for 4 axis use. This is needed if you wish to run a rotary or rotary and z axis.
Step 2. Open the microSD card on your computer via microSD card reader/adapter
Step 3. Format the microSD card in the FAT file format
Step 4. Download the zxya firmware from here: C3D 4 Axis Firmware (156 downloads)
Step 5. Download the 4 axis config file from here: C3D 4 Axis Config File (117 downloads)
Step 6. Copy both files onto the microSD card in the root directory (no folders)
Step 7. Eject the microSD card from your computer and re-insert it into the C3D controller
The official installation guide can be found here: