Recently I wanted to recreate my DotNetNuke websites on a new installation. So, I brought up a new DotNetNuke website and database. I then created portals on my new server to match that on my old server. I then copied the files from each portal directory from the old server to the new server. Lastly, I copied the skins and containers from _default to the new server. Everything went well and I set about recreating the sites.
When I got to working on recreating the users in the portal, I noticed that all of the user accounts and profiles from the old site were already listed in the new site. I started doing some digging and all of the profile information for all of the users were there too. I went to the database and looked a the Users table. All of the accounts (~20) were created within a few seconds of each other. I then looked at the UserProfile table and the LastUpdateDate date time stamp is at the same time as when all of the accounts were created. When I look at the aspnet_Membership table, All of the CreateDate, LastLoginDate, and LastPasswordChangeDate date time stamps are about 6 hours later than the dates in the other tables and they all happened within a few seconds of each other.
I said all of that to say, how could this have happened? Is all of the user account and profile data stored some place in the portal folders?