vBulletin Manual - Attachment Storage Type

You may choose to store your Project Tools' attachments in the database or file system, independent of what you have chosen to do with vBulletin's attachments. By default, they are stored in the database.

The process for moving the Project Tools' attachments from the database to the file system (or vice versa) is identical to vBulletin's. See this manual entry for more details.

Warning:

If you are intending on putting the Project Tools' attachments in the file system, they must go into a different directory than vBulletin's attachments!