Fine Tuned Tech - Why did Apple ship their premium 21.5 inch iMac with a slow laptop hard drive from 2012-2019? If you have one of these models, it can be upgraded
SSD vs FUSION DRIVE • Speed Comparison • Apple iMac 1TB Disk Speed Test - YouTube
Amazon.com: OWC 2.0TB SSD Upgrade Bundle for 2012-2019 27" iMacs with a Factory-Installed HDD or Fusion Drive, 2 TB 6G SSD, Drive Converter Bracket, in-line Digital Thermal Sensor Cable, Installation Tools :