Okay, this has happened more than once. A week ago or so, I was being very careful because I knew I only had about 100mb of storage free on my hard drive. Today, I downloaded a couple apps, and afterward checked to see how much storage was left after the apps were installed, fearing I was getting really close to full. To my surprise, I currently have about 7.5 gb of free space left. How does this happen? I have not been deleting or un-installing anything the past week since I last checked. My concern is OneDrive. I checked, and "access all files offline" is still turned on, as I want it to be. Though it's probably unlikely, I'm worried that Microsoft is deleting files from my OneDrive or something (I keep thousands of family pictures on OneDrive, and this is my only backup of them)... Why else would I suddenly have more free space? There seems to be no explanation. It has me very concerned about how this is happening!