Enhanced Storage Capability – Expand your Mac Mini M4 capabilities with up to 4TB internal storage. Note: USB-A ports do not support CD readers, Apple SuperDrive, or iPad charging. Optimized Self-Cooling – The Satechi M4 Mac Mini heat-dissipating design features bottom vents to help keep the hub cooler, while a recessed area on top ensures proper heat dissipation without obstructing the fan on the bottom of the Mac Mini.
eBay