Don't have correct permissions to any drive other than the boot drive

Question

I installed SL, and when it came time to enter in the user name, it said the name was already taken xxxx and so I entered yyyy. As an example.
Now User yyyy has Read / Write permissions for everything on Drive 1, the boot drive, but ALL of the other hard drives have xxxx as having Read / Write permissions, and not for my new account yyyy. So everytime I need to write a file to a hard drive, I have to fix permission for the folder the file resides in. This is getting old fast.
How can I change all my drives, folders, files, etc, etc to have yyyy permissions added without doing them 1 at a time?

Answer 1

what kind of backups? manual ones? then it's ok to do the following
select a drive and enter command+i. in the resulting popup, unlock the lock at the bottom, change the permissions as you want, then click on the "gears" action button at the bottom and select "apply to enclosed items".
However, let me stress here that you should NEVER EVER use "apply to enclosed items" on ANY system created folders, system drives or TM drives. that includes btw things like your home folder, your desktop folder etc. use it ONLY on folders you made yourself. using it on a system drive will have catastrophic results. using it on any system created folder will likely have highly unpleasant ones because such folders often have invisible ACLs and using this button will propagate them inside.