For people who have this problem when trying to transfer files from their phone to their computer, but get some error message saying "whitespace not allowed," I found a way to fix it. You have to change all your file names (all the files where renaming is possible) so that it contains only letters and numbers. Underscores could work too, but it's better to use numbers and letters just to be safe. Someone else posted a solution, and I wanted to add to that thread, but I couldn't find it.