Dynamic disks take less storage space, but they are slower than fixed disks. Decide if you want to create a dynamically allocated or fixed virtual hard disk and click Continue.When asked to select the hard disk file type, simply click Continue.Choose the “Create a virtual hard disk now” option and click Create.Select the amount of memory you want to allocate to the virtual machine (Windows 10 requires at least 1 GB for 32-bit or 2 GB for 64-bit).Choose a descriptive name of the virtual machine and select Windows 10 as the version.Launch VirtualBox and click the New button in the top-left corner.
Follow the instructions to set up drivers and everything else necessary to dual boot Windows on a Mac computer.
The great thing about dual booting Windows on a Mac computer is that the software you need to make it happen (Boot Camp) is included in macOS.