I was planning on buying a new 1 tb external hard drive from WD this week as my 500 gb WD My Book Pro Edition has gotten pretty full. (I partitioned it so that half of it is for time machine, and half is for manual back up of photos and video footage) A couple of days ago, I plugged in the My Book Pro and neither partition showed up. It's making normal noises, no grinding or clicking, just the usual spinning, but it's not showing up in the finder or in disk utility. So my questions are twofold. 1-Any advice on how to proceed with my current hard drive? 2-I was planning on getting a Western Digital tb hard drive, but now I'm hesitant. Any buying advice?