iMac (27-inch, Late 2013) - Technical Specifications
ACASIS USB C 3.2 SSD Enclosure Suit M.2 Nvme SSD 12+16 PIN for
External SSD on Late-2013 27" iMac | MacRumors Forums
iMac (late 2013) boot from usb slow | MacRumors Forums
Amazon.com: Satechi Aluminum Type-C Clamp Hub Pro with USB-C Data Port, USB-A 3.0 Data, Micro/SD Card Reader - Compatible with 2020/2019/2017 iMac & iMac Pro, Does Not Fit 2021 iMac (Silver) :
Amazon.com: 2013 Apple iMac with 3.2GHz Intel Core i5 (27-inch, 8GB 1TB Mac OS X) (Renewed) : Electronics
New CPUs, faster Wi-Fi, same flaws: Apple's 2013 iMac reviewed | Ars Technica
Apple iMac 21.5-inch 1.6GHz Core i5 (Late 2015) | mac of all trades
Apple iMac (27-inch, September 2013) review: New processors and faster Wi-Fi for Apple's slim desktop - CNET
Sabrent Premium 4-Port USB 3.0 Hub for iMac (2012 and later)