Satechi's latest MacBook Pro and USB-C iPad peripheral is the Hybrid Multiport Adapter that brings together a powerful USB hub as well as space for a SSD.
Satechi's new multi-use hub
The hub adds four ports to your Mac -- HDMI, two USB, and USB-C. Both USB ports are USB-A 3.0 ports while the HDMI port supports 4K output at 60Hz. The USB-C PD power can handle up to 100W of power to your Mac or iPad with USB-C.
By sliding off the top of the USB-C hub you'll reveal an M.2 SSD bay where you can add storage. It supports transferring data up to 5Gbps.
As it connects over USB-C it is compatible not only with Mac, but iPad Air, iPad mini, and iPad Pro as well.
It is available to order now in Space Gray or black for $89.99 but currently has a $5 coupon on Amazon.