When connecting a hub to the back of my MI IMac so I can connect it to other items that have USB and or SD cards for the camera, is it better to get a hub that plunges into the thunderbolt 4 or the C. And does it have to be for the Mi to work ok, there are lots out there
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You can use either a TB/USB-C or a standard USB-A Hub for those devices.
If you go with a USB-A Hub, get the one with blue High Speed USB 3.0 plug.
If you plan on having several devices connected to the Hub at the same time, then you will want one that has it’s own power supply.
That's a really odd question, since both Thunderbolt 4 and USB-C use the same type of connector. Anything that fits in one will fit in the other and work.
Thunderbolt 4 is of course faster and can offer more options than the regular USB-C, however the M1 iMac does not have Thunderbolt 4 ports. It has two Thunderbolt 3 ports and two USB-C ports.
When connecting the Hub, its own speed will determine what the port will do. If you get a USB 3.1 Hub it will limit both the USB-C and Thunderbolt 3 ports to USB 3.1 speeds.
If you want the fastest transfer speed, look for a Hub / Dock that offers Ultra High speed SD over Thunderbolt. Like this one: link-> Belkin Thunderbolt 3 Dock Pro - Apple
or this one: link-> https://eshop.macsales.com/shop/docks/owc-thunderbolt-3-dock
You can use the Thunderbolt 3 ports if you need to connect Thunderbolt capable Displays through the dock.
What's the best way to connect USB and SD card hub to my iMac?
