Samsung Electronics Sets New Performance Levels for Consumer NVMe SSDs with 970 EVO Plus - Samsung US Newsroom
Amazon.com: Dataram M.2 2280 256GB PCIe NVMe Gen 3.0 x4 SSD Compatible with Apple MacBook Air (2013-2017) & Pro (2013-2015), Mac Mini (2013) & Pro (2014), iMac (2013-2019) : Electronics
How to Upgrade/Replace the PCIe SSD in a 21.5-inch iMac 2019 (iMac19,2) - YouTube