sharpuser

I still cannot get my Surface Pro 3 from continually having an alert come up on the screen that I have low disc space "you are running out of disc space on local disc D". There are no files on Local Disc D and I don't know how to stop those messages from continually coming up, it is a real distraction.

I just received a surface pro 4 for work, any suggestions on a user's guide, to make sure I am using it efficiently? Thank you.