I need to optimize a USB-disc, but it does not show up, when I click the “Optimize discs” menu. Only my internal (C- and D-drive) are shown. Is it not possible to optimize USB-discs? Or is it an issue in my settings?
i have the same question… how to add an additional drive to be scaned and optimized? anybodsy know, or is this just not possible? if not currently able to be done, can we expect to see this ability added to “cleanup”, because it would be very much appreciated 
in the meantime, any suggestion on where to find a working option to scan and optimize an additional dive?