I have a document (LibreOffice Calc Spreadsheet) which is in my ~/Documents folder. However, I have the same file (older version of it) on a mounted drive.

In the past few weeks I have opened the file from both my ~/Documents folder and from the mounted drive. However, the latest version is the one from ~/Documents.

When I open the Dash and look in the documents lens, of course I will find my file twice there. One from the mounted disk and one from ~/Documents. But I don't know which one is which.

So, my question is: How can I limit the document lens to look for documents only from my /home. Or to exclude mounted disks from the search.

Thanks.

I use Ubuntu 12.04.