So it seemed like a good idea at the time, all of the sites on the root site collection but now you are beginning to regret that the content database is getting a little on the large side and managing the security is getting to be a pain.
So how do you move this subsite into it’s own site collection?
All you need to do is change the “script options” to reflect your needs and you should be away.
Remember that you use this script at your own risk and you should backup ad test everything before you commit to running it.
The script can run the commands or build a script for you to use at a later date, your choice just look at the $debug & $execute options.
Download file : ConvertSubSiteToSiteCollection as a text file