Upgrading an older iMac's PCIe SSD: Third-party solutions that save you beaucoup bucks
iMac 2013 (and later) with NVME SSD? | MacRumors Forums
21.5-inch iMac (Late 2013) Review: Iris Pro Driving an Accurate Display
Apple iMac 21.5inch 2013 Late SSD換装、メモリアップグレード – パソコンドック24 都城店
iMac SSD - 4mac
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Замена или установка SSD на iMac
128GB FUSION DRIVE PCIe SSD Apple iMac 21.5" A1418,27" A1419 Late 2013,2014,2015 | eBay
How to Upgrade iMac Hard Drive or SSD 2012-2020: EveryMac.com
Upgrade/Install PCIe SSD in a 21.5-inch iMac(Late 2013)