Level up your tech skills and stay ahead of the curve. Part 3. Switch to Boot Tab. If you need to migrate your data or are looking to keep a backup handy, you can clone your hard drive. It is really useful. Select the option that boots the PC from the USB flash drive. Step 4. Make External Hard Drive Bootable Windows 10 with Windows To Go. Here's how to do it in Windows and on a Mac. However there is a one difference and that's that, I believe, the recovery drive tool only gives you the option to create a disk for the computer you are using. When booting from a Windows setup disc, and occasionally other bootable discs as well, you may be prompted with a message to press a key to boot from the disc. To do this, use BCDEdit with the /copy option. 3. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/bd\/Boot-from-an-External-Hard-Drive-Step-1-Version-2.jpg\/v4-460px-Boot-from-an-External-Hard-Drive-Step-1-Version-2.jpg","bigUrl":"\/images\/thumb\/b\/bd\/Boot-from-an-External-Hard-Drive-Step-1-Version-2.jpg\/aid5825779-v4-728px-Boot-from-an-External-Hard-Drive-Step-1-Version-2.jpg","smallWidth":460,"smallHeight":258,"bigWidth":728,"bigHeight":409,"licensing":"