I've got a backup of my previous Mac via Time Machine on an external HDD. I don't want to restore the whole thing to my new system, but I would like some of the files from my old user folder - things from Documents, Desktop etc. When I navigate to the relevant folders I am told by OS X I don't have permission to access these. I imagine this is something to do with my old user account. Is there any way I can get into these folders? I can remember my old password but perhaps not the specific username? Thanks in advance!