In one word "Yes!" unless you're one of the many who never back up their data or image their operating system/installed software, then you needn't bother. But if you want to be able to image your system and maintain backups of your data then there is every reason to have separate drives/partitions for system and data. All I keep on my drive C is op sys, installed apps and system files. This keeps the space required to a minimum instead of bloating the drive with terrabytes of text, pics, movies and sounds files all buried deeap amongst system software in my documents, my pics, my this and my that folders! so when you make an image of the system drive it will not be bloated with terrabytes of user data. I use Macrium Reflect to...