Microsoft is coy about it in places, and estimates vary. (The time to make a Windows 10 recovery drive is before your PC dies. Grab a USB drive—you might need a big one!—and we'll show you how it's done...) Attila Balaton bought an 8GB USB key to create a Windows 10 Recovery Drive only to find out 16GB was required. Mea culpa: Answer Line was partly to blame, as my former colleague wrote that Microsoft suggests “at least a 4GB USB key.” It’s not his fault, though, as on this support page Microsoft says in order to create a Windows...