convert between GPT and MBR partitions using diskpart

First, run Windows command prompt (cmd) as administrator.
In the cmd console, run "diskpart".  (During Windows installation, shift + F10)


In the "diskpart" command,
to check the type of partition,
        list disk

to select a disk,
        select disk #   (#: disk number)

to convert,
        convert MBR  (convert to MBR partition)
        or
        convert GPT  (convert to GPT partition)

to create a volume,
        create partition primary (size=???)  (if size is missing, the whole size is used as a volume)

to format the created volume,
        (select partition #)
        (active)   (this is for MBR partition)
        format fs=FAT32 (quick)