Have a new mini coming today. Throwing a 500GB SSD in it which will be fine for everything I do on it. OWC kit to add it in addition to the factory 1TB drive. Question is, what to use the 1TB drive for? I already have an external USB drive for Time Machine backups. Already have a 2TB external for music, movies, etc. For that matter I have another dozen or more externals if I need more storage. So what should I use the other internal drive for?