Here also a second HDD and an external drive for the runtime(s), but DVD's for the executed DAZ and unzipped rest.
On the DVD's things are in numbered folders (D001 Victoria2, Re121 SP Morgandy, R009 BeachBaby...) with their page, promo images, evt tutorials,...
As I don't use make-up mats, I can reduce the volume of the texture folder some 50%.

One thing though: if you have that external HDD switched on all the time, it'll live even shorter that an regular HDD due to heat. So only switch it on to put and get, say, once per day.