To match the powerful processor (CPU) and graphics (GPU) hardware options, Lenovo's ThinkPad P72 provides space for dual M.2 PCIe solid-state drives (SSD) alongside a 2.5-inch hard-disk drive (HDD), which can also be upgraded. If your P72 didn't come with an M.2 SSD or you just want to add something faster, we've laid out all the steps required for the upgrade right here.
Full story from the WindowsCentral blog...