Even though people talk about "binary files", nobody in his/her right mind would ever think of their contents as being ones and zeros, but what ever expression some data structure or number format might require. Do yourself a favor and stop thinking in ones and zeros and think like a programmer should -- at the highest abstraction level that your tool supports.
Saving the files in some textual format would make them something like thousand times easier to debug when you change your code, data structures and file contents.