Problem with 3D printer not accepting new print gcodes Ok so I am trying to print a new fusion 360 file that I converted into an STL and then into gcode using cura and I got the gcode loaded onto the SD card and mounted into my Monoprice 3D printer, Maker Select 3D Printer v2, and tried to do a print. Now here is the strange part. When I choose "print file" and then select a gcode to print it takes me back to the main screen and from there the 3D printers screen displays "Printing...0%" for a few seconds. After this it just goes back to displaying "Stepper Disabled." And if it is not stepper disabled it is just a blank screen. I tried to mount and print multiple gcodes just to make sure that it was not the softwares fault and low and behold I was running into the same issue. 

Now before using today all of the gcode was printing just fine, however for some reason today it decided to give me this issue.
As you found out, sometimes the SD cards need reformating. 

And if they came with the printer they could be fake (Fake capacity), when you try to upload more than its real capacity they will just corrupt.

My Anet A8 came with an 8GB SD card and it turned out to be 128 mb. With RMPrepUSB you can do a capacity test and format it to the real capacity.