So i just bought a My Passport Ultra 1TB 3.0/2.0 to backup my current hard drive and want to make sure I format to the correct settings so I can use a program to back up my mac. It is an 08' Late MacBook and if I recall I can use Time Machine to back up my entire HD correct? does it act as a bootable HD or just a storage? Also, what setting do I format it so I can use Time Machine or another program for backing it up? It currently is in windows only format.