I have OpenERP 7 and I have been using it for 3 years, now I plan to move the attachments from database into my file system

That has been done and I followed a script posted here https://www.odoo.com/forum/help-1/question/where-are-document-attachments-stored-529 in order to extract the files from database into filestore

but the issue is that my database dump is still 5 GB, before extraction and after, it is still the same size

so how do I confirm that the attachments has been moved out of the database?