If you want to search file storage for specific files in file storage, the search is not very straight forward.
for example ...
+token.name.raw:"firstname.lastname@example.org" -tags:table-export -tags:table-import -tags:file-import
This will help you search for files that you uploaded and wasn't some sort of storage upload or table upload or transformation that you run or something.
Using this search function will help greatly reduce the number of files that you are looking for.