I'm new here and am having trouble with a new WD 2TB Element external hard drive. It is the first Element HD I have purchased. I needed a larger HD to back up all my music and video. I bought it brand new and plugged it into my 13 inch white Macbook and found out that it has to be reformatted before I can write to it. I have bought and used several other WD HDs in the past and never had to do this. I could find no directions on ho to do it in the scant instruction booklet and have looked all over online but have not found any help, so I am hoping a vet here can lend a hand. I really appreciate any help I can get. Really flying blind here.