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Tripp Lite USB 3.1 Gen 1 USB C Portable Hub with 2 USB Type C Ports and 2 USB-A Ports, Thunderbolt 3 Compatible, USB-C, - U460-004-2A2CB - USB Adapters - CDW.com
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Tests show Thunderbolt ports on M1 Macs don't fully support USB 3.1 Gen 2 speeds: Digital Photography Review
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