How Do I Move D:\ To A Different Physical Drive?

i have an acer ?? revocenter.  i did a power supply mod and added an ssd for c:\.  d:\ is on a regular hdd

how can i move the server folders on d:\ to another physical hdd?  i want to get a couple of physical hdd's of the same size (3-4tb) and install sb drivepool for "non critical" files.

if i can move d:\ to a bigger drive and then add another drive of the same size i can get by with sb drivepool for the non critical stuff and use the "server backup" for the critical stuff.

tia