The need to install Windows 8 from a USB device, like a flash drive, is a common one due to the fact that many computers, especially tablets and smaller laptops and desktops, no longer have optical drives.
In other words, that Windows 8 install disc doesn't do you much good if you don't have anywhere to put the DVD! If you want to install Windows 8 from a USB device, you'll need to get those setup files onto a USB device. Unfortunately, simply copying them there won't do.
Windows 8 is also sold as a downloadable ISO file which, if you choose to buy Windows 8 that way, requires some steps to get it properly copied to a flash drive as well.
Regardless of whether you have a Windows 8 DVD you need to get on a flash drive, or a Windows 8 ISO file with the same goal, the following tutorial will help you get the Windows 8 installation files properly copied to a flash drive so you can get on with the installation process.
Note: The following procedure applies equally to Windows 8 (standard) or Windows 8 Pro, as well as those editions of Windows 8.1.
Time Required: Getting the Windows 8 installation files onto a flash drive or other external USB device will take between 20 and 30 minutes, depending on what format your copy of Windows 8 is in right now and how fast your computer is.
A flash drive (4 GB or more)
A Windows 8 DVD or ISO
Access to a working computer, with a DVD drive if you have a Windows 8 DVD, with Windows 8, Windows 7, Windows Vista, or Windows XP installed
Important: If you have a Windows 8 ISO file and want that on a flash drive, start with Step 2. If you have a Windows 8 DVD and need that on the flash drive, start with Step 1.