Why can’t I install Windows 11/10 on a USB flash drive? The main reason why you are not able to install Windows 11 or Windows 10 from a USB flash drive is that the USB device is offline.
So ensure that you have a 64-bit CPU to install Windows 11. For Windows 10 users, it is recommended to upgrade to Windows 11 using Windows ... At least 8GB USB flash drive or blank disc.