Its been awhile since I have used a 500, but I pretty sure you have to be in ADVANCED MODE to delete or transfer the memory.Here it is on page 4. To change to Advanced mode, select Configuration / User Mode. http://www.newhollandplm.com/upload/047a8fa5-24bc-4ec4-aab3-080723040a48A-03%20-%20EZ-Guide500_1A_QuickReferenceCard_ENG.pdf