[willis936]

I have prints fail over serial on my CR-10S Pro (both stock and TM3D firmware). Maybe it’s a Creality design flaw, maybe it’s a Marlin firmware issue.

Also, the micro SD card slot has never worked well. For a while I had to be very gentle when inserting micro SD cards to have them stay in after the click. Now micro SD cards never stay in. I haven’t found any references to this issue with 3D printers online, but from what I can gather it is an issue seen on faulty micro SD card slots in other equipment. My fix has been to buy a micro SD card extender (flexible PCB), duct tape it in place, and pray it doesn’t come loose. It survived a 3 day print so far.