the problem is that we cannot migrate the attachments from the old version of vbullettin (3.6.0) to the 4.0.3 suite. The database does not link the attachments to the posts . We didn't have any problems with export\import. How can we solve the problem? The attachment files are located in a web space and not in the database. The amount of all attachments is over 3.5 Gb. For this reason we cannot use the database and we have to use the web space.