Can someone suggest a good, but tiny and light, external drive. I would like to be able to burn dual layer disks on it, etc. If the Mac one is best I guess I could go with it but I understand it works ONLY with the Macbook Air. I looked at several external drives in Best Buy in the PC section and non of them said anything about supporting the Mac. Isn't that weird. I have not been able to look at the Mac external drive outside of the box.