Lacie Drive write protected

Hi all,

I've purchased a new 500 gig LaCie drive and it is write protected and all the button pressing won't allow me to rename the drive. What I'm wanting to do is: I have a 250 Gig drive named after one of my clients. It's nearly full so I want to rename the new 500 gig drive the same as the smaller one then simply copy all the files from one to the other. Any advice would be much appreciated

Steve