I didn’t have a spare flash drive already, so I ended up purchasing a 256 GB SanDisk Dual Drive Go, which happens to be one of our picks for the best USB flash drive. Storage capacity is also important, as we’re now long past the era of install media fitting on a 700MB CD-R - the Windows 11 installer is over 5 GB. If you have an old or cheap flash drive with poor read and write speeds, then it can take longer to boot up and perform installations. Once it's done, unmount the USB drive (right-click and select Eject) from the desktop.Two factors matter the most for turning a USB drive into a boot drive: performance and storage capacity. Boot Camp Assistant will create the bootable Windows 10 USB.Select the Windows 10 ISO image from Mac's internal storage and select Continue.Select Continue, and check the option to Create a Windows 10 or later install disk.Go to Finder > Applications > Utilities and launch Boot Camp Assistant.To create a bootable Windows disk using BootCamp:

You will also need a 16GB USB disk, alongside the Windows ISO file for this method. Note: You can't use Boot Camp Assistant on Macs with Apple M1 chips. You can also choose to install additional Windows support software, which will be helpful if you are planning to use the bootable disk to install Windows on your Mac. This is an easy method and requires no additional software to be installed. If you have a Mac with an Intel processor, you can also use BootCamp Assistant to create a bootable Windows installation USB disk. Method 2: Create a Bootable USB Disk Using BootCamp Assistant

Create windows bootable usb