If you want to put Windows 8 on an USB device, download this tool that allows you to finish that job in a matter of minutes.
1. Download the Windows 7 USB DVD download tool from http://www.microsoftstore.com/store/msstore/html/pbPage.Help_Win7_usbdvd_dwnTool
2. This link leads you to the official Microsoft store where you can download the tool
3. After the download is finished start the tool and install it
4. When you’re done start the program and you can put Windows 8 on any USB device or even burn a DVD
Select the ISO file in Step 1 and follow the instructions on the screen
For more instructions, please read our tutorial How to quickly install Windows 8 from USB