A:AnswerNo, as I mentioned in my review everything‘s gonna be external plug-ins or NAS but there is a PCIE internal slot if you open the case up to put in a memory stick that currently go up as high as one terabyte so that would do is your hard drive and it actually runs fast too because it’s SSD.
A:AnswerWell its not expensive so i dont bdelieve you would get anything for trade in but my thing is if you get 3 years worth of use then you got your money worth.
A:AnswerYes, it is safe to use.
The battery should not be under rough conditions though
Make sure your laptop does not get to hot and that your battery does not get damaged
That warning is there to basically warn you not to dispose the battery in fire or heated places when replacing the battery