That is the same link as before. I can see the list of files but cannot easily access them. Can you just upload a file or two directly? Personally, I do not know the ins and outs of using online Google tools.
I have about a year and half experience with 3D printing. I initially started with the TAZ6 and several months ago I decided to get a 2nd printer as a backup. I bought the Prusa i3 MK3s kit as well. I simply LOVE IT.
Without seeing any of your STL files I can offer some advice on a couple of points. First, make sure the bodies you export for STL are solid bodies. If they are not, then the slicer program that creates the code for 3D printing can cause print problems. For example, lets say you have designed 2 lego blocks and they are connected together and they look like one solid body but in actuality they are 2. This can be exported as 1 STL file and it may cause print problems. You need to combine the 2 bodies as 1 with the Union tool, then do the export. Another thing to consider is the overall part design with regard to overhangs and whether the part can be printed with or without support material.
Hope that helps…for now.