I have an ancient MacBook Pro first generation which rather than ebay or throw I am planning to use with an audio interface as a multitrack recorder using either Garage band or logic. However I am encountering a problem with the internal disc drives and it doesn't seem to make any sense to me. There is a Fujitsu MHW2120BH media which looks absolutely full, I may have partitioned it ages back but it's 109.13 GB blue and 10.56 GB red, the red is untitled and appears separately on my desk top. Either way there's nothing that physical size or nothing I can find that's taking up that much space. I am receiving continual start up disc messages, it all feels really sluggish which is not how I remember it.The next disc is a 108.48 GB SATA Internal physical volume OS X extended, even this doesn't make sense in that there's only 13.41 GB of space left and is showing 6.95GB of apps, 11.6GB of photos, 14.35GB of audio, 6.76GB of movies, and 55.41 other?! When clicking info on Fujitsu disc it displays, available space 0, also takes repairable No, Bootable No, I'm a complete novice but that doesn't make any sense..when viewing the SATA disc partition, erase and unmount are not old as first aid is. If I try to partition the Fujitsu it will only allow 3GB.. Ideally I will not be using this for anything other than recording projects so I'd really like a clear computer, so wonder what I need to do. It's probably a silly idea but my iCloud looks full, which at the beginning of the week wasn't even a quarter full, that seems really odd, I wondered if somehow my iCloud may be linked to this MBP and storing everything on to here as well. Any advice, steps much appreciated thanks.