UGREEN Mac mini M4 Docking Station is a stand that sits under a Mac mini M4 or M4 Pro, matching its shape while adding ports and an internal SSD slot. It suits Mac mini owners who want more storage and easier-to-reach ports.

Key features:

Add up to 8TB of storage with an M.2 NVMe SSD in 2230, 2242, 2260, or 2280 size (SSD not included).
Transfer to and from the SSD at up to 10Gbps over PCIe 3.0 x1.
Plug in devices through three 10Gbps USB-A ports, two 5Gbps USB-A ports, and two 10Gbps USB-C ports.
Read SD and TF cards at up to 170MB/s with the UHS-I card reader.
Turn on the Mac mini without lifting it, using the power button lever.
Power the dock from the Mac mini, or add an external adapter for multi-device setups.

It works only with Mac mini M4 and M4 Pro, not Mac Studio, and connects with an included 4cm cable. UGREEN lists it at $89.99 with a 2-year warranty.