scan disk

Nope there is no SD card slot. If you need to use SD cards, then you will need an external USB card reader.

If you need an external SD card reader?

you can get the > https://www.apple.com/shop/product/MUFG2AM/A/usb-c-to-sd-card-reader

or one for less at > https://www.amazon.com/dp/B06XSSHZ63/ref=redir_mobile_desktop?

If you need to plug a USB-A type flash drive into the new iMac?

you can get the > https://www.apple.com/shop/product/MJ1M2AM/A/usb-c-to-usb-adapter

or one for less at > https://www.amazon.com/s?k=usb-c+to+usb+adapter&i=electronics&ref=nb_sb_noss_1

There is no such thing as a "Scan Disk" port. Do you mean a "SanDisk" USB flash drive?

Cheers,

Jack