pdf save and send (date range filename)

Not sure what you mean by pre-set the location. I think you want to replace this:

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With something like this:

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If C7 has a date, and the file name is simply the date, yes you're right that "/" is an illegal character in a Windows file name. You can do this:

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for dd-mm-yyyy format. You can, of course use any format. (I personally prefer yyyy-mm-dd so the the files can be sorted properly by name.)