USB 3.0 HUB Multi USB Splitter 7 Port Expander Multiple USB 3 Hab Use Power Adapter USB3.0 Hub with Switch For PC
(1)Do not used for charging , it is used for offering more usb ports to Transfer file
(2)The specification of the power supply is 3.5*1.35mm 5V 1A, it support less than 1TB hard disk , if your hard disk is more than 1TB , then the power supply not suit you
(3) The power supply can solve the problem of insufficient power supply, if you need work with a hard disk , then you should choose with power supply.