Max2Play Home 2016 (en) › Forums › Max2Play on Raspberry PI › Rpi2 + Hifiberry Amp + 7" official Touchscreen = no USB harddisk (no power) › Reply To: Rpi2 + Hifiberry Amp + 7" official Touchscreen = no USB harddisk (no power)
you need an extra power supply for your hard drive. I got the same issue with my 2,5″ hard drive. It works with an additional usb hub with a additional power supply for the hard drive. The power supply of the computer consumes all the energy already for the WLAN stick, the amplifier and the Raspberry Pi.