![background image](http://html.mh-extra.com/html/epson/al-m7150dn/al-m7150dn_user-manual_108710159.webp)
3.
Loosen the four screws of the additional interface slot on the back of the printer.
4.
Pull out the additional interface slot. Pull the black parts of the slot straight out and avoid tilting.
5.
See the following to identify where to place the HDD.
>
HDD (AL-M8250DN/AL-M8150DN Only)
>
159