The 192 GB refers to memory, aka RAM, not storage. RAM stands for Random Access Memory, which is used for holding data for running applications and is randomly accessible, meaning the CPU can access data from any address in memory. Large amounts of RAM like this may be used for rendering 3d environments, editing high resolution footage, or other intensive applications. For reference, your xbox has 12 GB of RAM, and my mid-tier PC has 16 GB of RAM, so 192 is quite a lot. Also this is a desktop computer, not a laptop.