Basically over the next few months I'll be building a pc, and I want both Windows 8.1 and Ubuntu on it. I want to have both the OS's installed on a HDD/SDD by themselves. Then I want a 1TB drive for music, movies, games, and all of my programs. Firstly, how big should the first drive be, and will my programs run okay if they're installed on a separate drive from the OS? Let me know if I explained that well, I'm sorry if it's confusing.