You are making this way to complicated. Take the files out of the share folder you don't want to share. Name it: Noshare or something like that and then forget about it. If the files you are sharing do not have easily identified "names", i.e., jpeg001 etc., rename them in a way that makes them easily identified and then you can more easily move them around without losing sight of exactly what your file inventory is in each folder.
Noli Nothis Permittere Te Terere!!
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