I want to connect a Thunderbolt usb4 to old USB port

I have just bought an imac M3 which has thunderbolt 4 sockets for USB. I want to connect my existing USB storage so am looking for an adapter with male connector to plug into the thunderbolt socket and female socket to plug in my (old) USB storage device


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iMac 24″, macOS 14.5

Posted on Jan 4, 2025 2:33 AM

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Posted on Jan 7, 2025 9:59 AM

This is what you want;



There are at Amazon: USB C to USB Adapter, Type C Thunderbolt 4 OTG Converter, USB C Male to USB 3.0 Female Adapter (3-Pack) for Apple MacBook Pro, Mac Book, iPad, Samsung Galaxy S20-S23 and More (Black/Grey/Silver)


There are many offerings at Amazon for the same item. Just search for "USB C to USB A adaptor".



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Jan 7, 2025 10:27 AM in response to mandywr

USB-C itself is “just” a connector and a set of standards for determining how that connector will be used in a particular set of circumstances. You can think of it as a “Swiss Army knife” type of connector that can support multiple protocols (“blades”).


The USB4 / Thunderbolt ports on Apple Silicon Macs are multi-purpose ports that support USB 3, DisplayPort, USB4, and Thunderbolt. They adapt to whatever is plugged in. Some Macs also have single-purpose USB-C ports that just support USB 3.


USB-C to USB-A adapters take USB 3 from one connector and put it on the other. They don’t require or use DisplayPort, USB4, or Thunderbolt (none of which USB-A is capable of supporting), and can be used with any of a Mac’s USB-C ports.

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I want to connect a Thunderbolt usb4 to old USB port

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