Sorry for what may be dumb questions but I am not very technical. I also have not kept up to date with technology. I want to replace my 2011 iMac with a new one. While I want to keep the cost as reasonable as possible, I am not constrained by a budget. 1. I presently have over 1TB of music which I prefer to keep on the internal drive. I guess that means I need a 2TB drive and I want SSD. I know it's a major expense. I've run into problems in the past having my music on an external. 2. I have an extensive video collection, about 10TB and growing. Am I okay keeping these on a standard external drive? Am I okay with my present setup - I have four 4TB WD SATA/64MB cache drives purchased in 2014. 3. Will I have to download or purchase new programs to replace many of my present programs? If not, are they easily transferrable? On a related note, is the migration assistant all I need to transfer my files and settings? 4. Am I better off buying a minimal amount of memory when I buy the iMac and upgrading from a third party? 5. What else do I need to take into consideration and options to consider? Many thanks.