I went to update the sync3 in my wife's 2016 escape (non nav) and got the dreaded "not enough memory" (can't remember the exact error phrase). Tried 5 updates and got the message every time. Seems like this is a common occurrence from what other message boards say
I am hoping to figure out how to get it to update. I really want to be able to swap the USB hub and get apple CarPlay to work.