I'm having a bit of a problem with time machine. I just recently set up a new boot up disk to run OS X on a 256 SSD through thunderbolt on my 2011 iMac. Everything is working great but I'm having issues with my time machine backup....it keeps saying that I don't have enough space on my 2 tb hard drive. I'm thinking this has to do with the fact that i'm currently backing up my old spinner (where I have around 1.5 tb of data), all the old system files AND the new SSD. Should I exclude all the non-data files on my old spinner in future backups and just backup the SSD system files instead?