my ender 3 is brand new and wont print anything but the cat.gcode file on the "tf’ card but every time i try to print anything else it heats up downloads the file and then moves the bed all the way to the front and then does not do anything else and auto ends the print i have tryed printing the cat.gcode file to and it goes to print it fine but then changes the temp of the bed and nosle down so nothing sticks to the bed please help.
Hello @james1 …! 
Welcome to the Creality Forum…! 
Is your printer an Ender-3 V3 ??
What is the filename and extension you are trying to print…?
no it is just a ender 3 and the file name is my name and then the print name