HP LaserJet 4345 Multifunction Printer series - Manual (Page 291)

3. At the back of the MFP, remove the formatter cover.
4. Open the formatter door.
5. Remove the flash memory card from the antistatic package. Hold the flash memory card
with your fingers against the side edges and thumbs against the back edge.
6. Press the flash memory card straight into the slot. If it does not go in easily, rotate it
180 degrees and try to insert it again.
CAUTION Do not insert the flash memory card at an angle.
Note The first flash memory slot, marked "Firmware Slot," is reserved for firmware only. Slots 2
and 3 should be used for all other solutions.
ENWW Installing memory 277