[John Rogers]

The freezing thing is a myth. You never want to disconnect a hard drive unless you are going to take it to a recovery shop and they are big bucks. Remember this is one physical drive with a C and a D partition. I used to do that and finally bought several disks and each has it's own letter and each is used for different things.
C is a solid state drive, very fast since the OS writes most temp stuff there. 500MB with 500MB recovery partition
D is the DVD reader/burner.
E/F/G are used for external drives/ thumb drives such as my Vizio movie box.
H is work and school (I taught but finally retired). 4TB
L is for web stuff/downloads and images. 4TB
M is for images backup 4TB
N is Temp storage. 4TB
Q is auto weekly backup. 6TB

As noted see if you can get a drive or two, then as noted above move stuff off.