The DeltaMaker 3D Printer features a built-in Raspberry Pi computer, which uses a SD card for storage.  This internal SD card is accessible by removing the access panel on the bottom of the printer.  Please see the following Tech Note for details instructions to update the SD card:

TN1004 SD Card Reflash Procedure

Recommended SD Card Utility:

DeltaMaker SD card image: (May 25, 2017)

Note: If you will be using Etcher to write the image to your SD card, you do not need to unzip the image file.

As discussed in the above Tech Note, if you will be using Win32DiskImager instead, unzipping the downloaded image file (.img) is required.