It seems that lots of questions deal with assigning drive letters to external hard drives that will *stick*. That's NOT what this question is about.... :-)
I am partitioning external hard drives to less than 2TB to support Windows 7 disk imaging.
When I do this, I Shrink the volume and then select New Simple Volume.
In the New Simple Volume wizard, it gives the opportunity to assign a drive letter or not.
Since this is an external drive that will move around between computers, which is the better selection or does it matter? I don't think that I care what drive letters are assigned when it's plugged in.