HP LaserJet 4050 Printer series - Manual (Page 232)

C-8 Printer Memory and Expansion
EN
Installing EIO Cards/Mass Storage
Turn off the printer before installing the EIO card or mass storage
device.
See Figure C-1 for orientation and location of the EIO card or
optional mass storage device, such as a hard disk.
Use HP Resource Manager to manage fonts on a mass storage
device (page 25). For more information, see the printer software
help.
HP is constantly introducing new software tools for use with your
printer and accessories. These tools are available from the Internet
free of charge. See page viii for how to visit the HP website for more
information.
After you have installed a new device, print a configuration page.
Figure C-1 Installing EIO Cards or Mass Storage Devices