Preventing Nx Witness to take over and occupy hard drives

Goodmorning.

I have NXWitness server running in HP ProLiant server. I have multiple hard drives, some of them are dedicated to NxWitness, and i am happy with that. But NxWitness automatically occupies space, and creates SPAM named NX Witness Media in every single drive i add! How can i prevent this? Server is not only for cameras, it has multiple purposes. Hard drives are dedicated for different purposes, NX Witness has its own drives, and should stay there. Yes, i can turn off (not remove) storage in NX Witness, and delete content ot folders... I must do that every time i add a drive. That irritates.