Here on the left image you see, my printer has the 4.2.2 mainboard and this on the right is how the 4.2.7 looks like. Then, use the small hex key that came with your printer to remove the 3 screws from the Ender 3 control box—this is the box located beneath your bed. With the connections made and the Raspberry Pi powered up, the printer board should be getting power too. The blue LED on the board should be on, and the LCD panel should also be on. The 4.2.x boards would be easier because you can flash the firmware over USB, without any modifiacation. Sign up for our newsletter to get updates on new Creality 3D printers, deals, and new articles.

Or, if it is mom’s computer, maybe you just don’t want to. If you require a hex editor that can handle large files quickly, the Hex Editor is the right tool for you. The program is simple to use, allows you to cut, paste, import and export, save and load, and reverse unlimited modifications. It is also an excellent choice because of its fast, lean, and powerful design. For the actual data recovery, a spreadsheet was created to make an educated guess as to where the lost file should be. Starting at this address, about 90MB of data was copied into a new hex editor window. Because the SD card was plugged into a Mac before, a bunch of data was written on the card.

• Either clone the source code from their official Github page, or download the compressed ZIP archive below.