This will allow you to use a regular SD card on your Max. You'll need to install the converter from the link below. It attaches via the two console screws underneath (I'd suggest replacing them with socketed M3's, but that's just me). I'd also suggest gluing the converter in to keep if from being pulled out when you remove the card.
May printed without support.
UPDATE: 9/7/2020 I have resolved an issue with the hot bed clashing with this SD reader when it is fully extended. The stl file has been updated to correct this error.
https://www.amazon.com/gp/product/B01D9JIUU0/ref=ppx\_yo\_dt\_b\_asin\_title\_o07\_s00?ie=UTF8&psc=1
The author marked this model as their own original creation. Imported from Thingiverse.