A:AnswerPlease note that the hardware physically is capable of supporting VR titles, compatibility with headset depends on the headset you plan to use as the required I.O may not be available. Please make sure to confirm the exact I.O requirements from your headset manufacture before purchasing the laptop if the intended use is specifically for VR.
A:Answerit has one storage m.2 currently occupied by the 512 drive and two DIMM slots occupied by two stick (2x8GB). You can replace any of those as you wish