i accidently change my security properties to be without have full control how can set it back so i would be able to delete and add things to my portable hardstore?

which windows version are u using? you may be in a wrong forum.. try these .. 

vista  http://social.technet.microsoft.com/Forums/windows/en-US/home?category=windowsvistaitpro

windows 8/8.1  http://social.technet.microsoft.com/Forums/windows/en-US/home?category=w8itpro

windows 7 http://social.technet.microsoft.com/Forums/windows/en-US/home?category=w7itpro

or consumer support forum http://answers.microsoft.com/en-us/windows