I’m having the same problem on an iPad Air trying to load a 331 mb file. With the mobile viewer I try to load the file, but after trying to load it a few seconds it crashes every single time. This is a Sketchup file sent to me by a customer so I can put together a contract based on their Sketchup drawing. Is there any other app that could view a Sketchup file? I need to be able to read the file, but the Sketchup Mobile viewer is useless to me at this point. I do not have Sketchup, so that is not an option.