Recently bought a new Dell G3 3779. It has a 1T SSD drive and an SATA mechanical drive. The SATA is only 100gig's. Dell installed the operating system on the SATA and it is almost full. I would like to install a larger SATA drive, but can I install an SSD without messing with the system? I assume I likely can, but is there a reason Dell used an SATA drive? But why such a small one?