QNAP QBack-25S Guía De Instalación Rápida página 7

Install Hard Drive
Please follow the steps below to install a hard drive on QBack-25S:
Step 1. Connect the hard drive to the PCB board.
Then cover the four corners of the hard drive with
the shockproof pads. (Note that the shockproof
pads should be installed in the direction as shown
in the pictures).
Step 2. Install the top cover vertically. Fasten the 4
screws on both sides of QBack-25S.
Connect QBack-25S to the PC/ Notebook via the USB Cable
The main USB connector is for data transfer and the
subsidiary USB connector is for additional power supply.
We suggest you to connect both connectors to your PC/
notebook every time you use the device.