Added a 128GB SSD to 27" iMac I've added a 128GB SSD to my mid 2011 27" iMac and replaced the defective original HDD with a new one (1TB). Used Time Machine as back-up.
How do I transfer ALL my data (about 620GB) to the two new drives (from TM)
 using the SSD for the OS (Sierra) and the HDD for everything else.
What´s the simplest way to do this?
You can use a HDD enclosure to connect it via USB.