Export the Subsite moved to site Collection Using PowerShell

Export the subsite


STSADM:

stsadm -o export -url "http://sharepointsite/sites/order/" -filename D:\backup.cmp -includeusersecurity -versions 4


Powershell:


Add-pssnapin microsoft.sharepoint.powershell

Import-SPWeb -identity "http://sharepointsite/sites/order/"  -path D:\backup.cmp -includeusersecurity  -force