I Googled "Briefcase Windows 10" and got a bunch of hits. Going to the Microsoft site, all I got was "Use Windows DriveOne" that has a whole 7GB of free space. Other hits suggested that I download and run a file and do some stuff and that would give me Briefcase. I'd like to do this but am hesitant to download and .exe from someplace I don't know. Does anyone have a site that they would trust to download and run a file to install Briefcase?