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Hello, in march 2015i bought iMac 5K with SSD 250GB. Model: APPLE SSD SM0256F Recently i have an Samsung SSD 850 Pro 1TB SATA III, and my question is: Can I instal this SSD Sata on my iMac? It is possible the both drives? ( Ithink APPLE SSD SM0256F is an m.2 Drive). If it is possible mount the the drive i will improve the HD speeds? Thanks in advance!

Hello, yes you can upgrade the storage by simply buying 2.5 inch to 3.5 inch disc tray and mounting that instead of the hard drive down below. https://d3nevzfk7ii3be.cloudfront.net/ighttps://www.ebay.com/itm/2-5-inch-to-3-5… Hope it helps

Sorry, but i don’t have the fusion drive 3.5. I bought iMac with SSD 250GB built in( APPLE SSD SM0256F). And i am not sure if it is a M.2 Drive. My question is can i install a new SSD SATA 3 (Samsung 850 Pro) on my mac? if it is a M.2 built in, can i run SATA3 new drive + M.2 drive? I Call Apple and with my serial number they don’t have sure if it is m.2 or Sata 3 inside. Or its better buying an Thunderbolt enclosure to my Sata Samsung? Can somebody help me?