PASBUY® Bus-Powered USB 3.0 4-Port Compact Hub 5Gbps Transfer Rate With a Built-in 3Ft USB 3.0 Cable+Extra Ac Wall Charger Adapter
Works as good as the ridiculously expensive Apple version for a quarter of the cost. If you use a memory stick that says it requires too much power, use an unpowered hub in between. There are plenty available here under $10 if you don't have one. Also, you need to save your video and image files in the DCIM directory of the memory device, and use exactly 8-character file names like IMG_1234.jpg.