I currently own an iMac 5.1 that was purchased in 2006 running 10.6.8 Snow Leopard, with a 2 GHz Intel Core 2 Duo, 2 GB 667 MHz DDR2 SDRAM and 250 GB storage (of which I have 57 GB remaining) with a 500 GB external hard drive (which is partitioned, half back-up, half files). You can tell by my writing that I have no idea what I am talking about. But, I do want a new 21.5 inch Retina 4K iMac! I've been reading the comments posted about the new iMacs and it's all over my head. Here is my story... I like to come home and sit at my desk and use the iMac for the basics (e-mail, Word, Facebook, YouTube, blog posting, and sorting/editing photos, and I am not a gamer). I own an old iPad 2 but no smartphone. (I am debating whether to buy a new Sony DSC-RX100M III Cyber-shot Digital Still Camera or an iPhone.) I live in Japan. A Japanese friend of mine suggested in broken English that I should stick to the standard 3.1 GHz Intel Core 5 processor and the 8 GB memory, but that I should upgrade to the 2TB Fusion Drive, especially if I buy a new camera. Does this sound correct? Any other suggestions (in plain, layman's English, if you please)? Also, when I do purchase my new iMac, how do I transfer all my files from my current iMac to the new iMac? I thank you in advance for your advice.