Now you are having HFS+ drive with MBR partitioning scheme and you are free to return all the data to the drive. Open Disk Utility (Applications -> Utilities), choose your HFS+ drive (it might be required to check View – Show all devices), and click “Erase” choose Mac OS Extended (Journaled) and Master Boot Record in Scheme drop-down list. Solutionįirstly, back up all the necessary data from the USB stick on your Mac, because the next step will clear all the data on your drive. This happens, because Windows has issues with mounting removable drives, which have GPT partitioning scheme. After plugging in HFS+ formatted USB stick, Windows sees a partition with only ~200 Mb size, when the initial size is much larger.