USB, Wi-Fi, and SD card (via external display).
Here’s the official manual link for the Makerbase MKS DLC V2.1: makerbase mks dlc v21 manual link
If you actually have a different board (e.g., MKS DLC V2.1 or MKS Robin, MKS SGEN), please double-check the silkscreen on the PCB. Let me know the exact version, and I can point you to the correct manual. USB, Wi-Fi, and SD card (via external display)
For community support and troubleshooting, users often frequent the LightBurn Software Forum or the FluidNC Wiki . MKS DLC V2.1 or MKS Robin