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If a device is not being detected through the Type-C Aluminum Stand & Hub for Mac Mini (models ST-ABHFM and ST-ABHFS), the cause is usually the connection to your Mac Mini or using a port that does not supply enough power for that device. Work through the steps below.

Steps to fix a device not detected on the Type-C Aluminum Stand & Hub for Mac Mini

1. Check the connection and the LED. Make sure the stand's built-in USB-C cable is plugged into one of the Thunderbolt 3 ports on the back of your Mac Mini. The LED lights up when the connection is good. If it is off, reseat the connector or try a different Thunderbolt 3 port.
2. Confirm your Mac Mini is supported. The stand works with the Mac Mini from 2018 and later. It draws power from the Mac Mini through the Thunderbolt 3 port and does not use a separate power supply.
3. Use the right port for the device. The hub's USB-C port is low-power and is meant for small, low-power items such as an iPhone or a small USB-C thumb drive. For an external hard drive, such as a Samsung T7, plug it into one of the three USB 3.0 (USB-A) ports instead, which supply more power.
4. Connect only one external hard drive at a time. The hub's USB power is limited, so connecting more than one powered drive at once can stop them from being read.
5. Know the USB-C port's limits. That port handles data only, at up to 5 Gbps. It does not carry video and does not charge devices, so a blank monitor or a device that will not charge through it is expected.
6. Test the device directly. Plug the drive or device straight into the Mac Mini to confirm it works, then reconnect it through the correct port on the hub.

If the problem continues after these steps, submit a support request.