Can someone answer if this actually reliably works? I don't know if it's the usb-c hub that I have that doesn't allow it but when I try to plug in two 2.5" external hard drives into the hub that's plugged into 1 usb-c port on a MacBook Pro, it is capable of reading both drives but the moment I try to transfer files from one hard drive to another, 1 of them fails and ejects due what I believe is a lack of power. Knowing this, I simply plug in the hard drives into individual ports but this of course is not possible on the MacBook with only 1 usb-c port. It seems like a huge oversight if the MacBook is not capable of powering two 2.5" drives off of one usb-c port. Then again, maybe it can and it's just the hub that I am using. (Satechi TYPE-C MULTI-PORT ADAPTER 4K WITH ETHERNET V2) Has anyone been able to successfully transfer a large amount of files between 2 bus powered hard drives using a usb-c hub plugged into 1 usb-c port of the 12" MacBook? If so, which hub are you using?