Renovation of external power supply for mobile hard disk


Since the power supply and data transmission of the mobile hard disk are all through the USB interface, the current may be insufficient to identify the device due to insufficient power supply or the line is too long, resulting in repeated disconnection, so I modified the transmission line. Everyone will have a USB mobile power bank. My idea is to supply the power in the transmission line of the mobile hard disk through the USB mobile power bank alone. See the picture below for the actual effect.