Hello everyone, I am seeking advice on SSHD and SSD upgrade options. My 3 year old 1.2 TB SSHD seems to be dead. I had partitioned 1 TB for OS X and 200 GB for windows, but I never installed windows. However, I used about 800 GB on the OS X side, mostly pictures and music. This is a 27" 11,1 model with 2.66 GHz core i5 processor with 12 GB RAM. Because I am close to 1 TB in capacity, I am looking to upgrade to a Seagate Firecuda 2 TB SSHD and adding a second drive, a Mushkin 500 GB SSD (behind the optical drive). Mushkin because of price, $150 https://www.newegg.com/Product/Product.aspx?Item=N82E16820226852 Concerns: 1. I am adding the SSD to get (and keep) a good speed boost. Planning to load OS X and Office on SSD and the rest on SSHD. Will this work well? Any suggestions on setting up iTunes? 2. I am worried about these dropping back to SATA 1 speeds. I searched and I know some have had trouble with SATA 3 drives dropping down to SATA 1 speeds but I could not find any related threads. Will I need to resort to SATA 2 specific drives to get the most speed? 3. If there are no issues with the above plan, I would be using time machine to back up to a 4TB external drive. Is this fairly straight forward or any suggestions otherwise? Thanks in advance for your help and tips.