Although this is not an Access specific question, there is a general approach to finding files on a computer that you can use, I believe.
This screen shot shows a search on a D:\ drive, although you could search any drive, e.g. your C:\ drive or a network drive the same way.
This will return a large number of potential matches, so you should narrow the search as much as possible, of course.
It may be the case that some folders are not included in the default search, so it will help if the location you selected is an otherwise accessible folder.
