Ricoh DD 4450 Service Manual page 168

Firmware Update
***: Part number X: suffix #: version No.
4. Wait until the data is transferred completely.
Do not remove the SD card from the PC until after all data is transferred (at this time,

the PC says that it is safe to remove the card).
5. Compare the size of the file on the PC and the file on the SD card. If the sizes are different,
the data was not transferred completely.
Do not take out the SD card until after you turn off the PC or disconnect the USB

Reader/Writer.
C279 6-4 SM