

In the Format drop-down menu, choose MS DOS (FAT) (finally!).With the volume M selected in the sidebar, click Erase from the menu.Reformatting step 3 - reformat M as MS DOS (FAT):.Click Apply (after volumes are properly specified), click Partition (to create partitions), and then click Done.Enter a name (I called it T), size (16gb) and Format as MS DOS (FAT) (we're getting there).Click the Add button (+) appearing below the blue pie chart to add a new partition.With the volume M selected in the sidebar, click Partition from the menu.Reformatting step 2 - partition to create a volume T:.Click Erase button, and then click Done.Enter a name for the volume (I called it M).In the Format drop-down menu, choose Mac OS Extended (Journaled) (Yes!).Click Erase from the menu near/on the title bar.In the sidebar, choose the external USB drive.Reformatting step 1 - create a Mac OS formatted disk:.

