Can I Upgrade the SSD and add an SATA SDD?
In this iMac Intel 21.5" Retina 4K Display (2015) it has an APPLE SSD SM0256G fitted, I *think* this is a PCI Express card - google is bit vague. Assuming that it is I would like to fit a large SSD - a Samsung 850 Pro 1TB - into the SATA hard drive bay inside the Mac. Is this possible?
Also, I would like to replace the existing SM0256G with a larger drive, such as the Samsung 960 PRO M.2-2280 512GB PCI Express 3.0 x4 NVMe Solid State Drive, Or is it a proprietary connector?