Either a USB stick or a CD or DVD is suitable for these purposes. You can create a Windows 10 recovery USB drive from another computer if your system crashes before you make a recovery drive. However, please understand that you cannot use a Windows 8 recovery drive to recover Windows 10, and vice versa.
Nov 17, 2014 · Using this tool, you can easily create media to reinstall or do a clean installation of either the 32 or 64-bit version. Media Creation Tool for Windows 8.1