Currently have a November 2011 built 27" iMac. When bought I specified the 256Gb SSD + 1TB HDD option. Lately my HDD has started to make some funky noises so I'm looking to replace it with a 1TB SSD (Samsung 850 EVO) as they have come down it price considerably. I have watched numerous videos on how to replace the HDD on these iMacs and its something that I'm going to do myself however I have yet to see one with both the Apple SSD & HDD fitted and am unsure as to whether or not it will be the same process. Does anyone know where the Apple SSD is usually installed on these iMacs? I have ordered the suction cups in order to remove the screen so if nobody knows for sure I'll open it up myself (When they arrive) before I splurge £250 on an SSD I may not be able to fit.