bitcored + vmware: disk space increases INCREDIBLY fast
It may be because of the nature of the entire blockchain, and the virtual disks itself. 400Gb+ can be the blockchain obtained from the network, temporally persisted, and 13Gb seems to be the amount that is really persisted.

Those numbers are fine in orders of magnitude when operating a full bitcoin node. To control the grow of the space, maybe creating a fixed-size virtualbox will help