Hi everyone. I'm new to this forum and this is my first post. I just bought a new 2017 iMac with kaby lake and it is the mid tier one. I bought it from the Apple Store and I just realised that I didn't have the SSD and had the 1 TB Fusion drive. I am afraid that the Fusion drive make my iMac be a stepdown from my 2012 MBP Retina which had SSD and be much slower. I am thinking of buying a Samsung T3 External SSD and set it as the Main boot drive to make it as fast as my MBP. I will then stick it on the back of the iMac. Is this a possible solution? Please do help me.