Datamax H Class Operator's Manual page 18

•
Notes: Before initial use, SDIO Memory Cards and USB Memory Drives must be
formatted by the printer, see Modules (in Printer Options) for details.
•
The SDIO Slot supports SanDisk© SDIO Memory Cards up to 1 GB; SDIO
Multi Media Cards, however, cannot be used. When installing an SDIO Card,
turn OFF the printer then slide the SDIO Card into the SDIO Slot. Upon
power-up, the printer will assign the SDIO Card as Module F. When
removing an SDIO Card, turn OFF the printer, and then press IN on the SDIO
Card to release it.
•
Unsupported or defective SDIO Memory Cards may prevent the printer from
powering-up.
•
The USB Host Ports support "plug and play" USB Memory Drives. Only one
drive will be recognized by this dual port. Upon power-up, the printer will
assign the USB Memory Drive as Module H.
•
Whenever upgrading printer firmware via a USB Memory Drive, remove any
connected USB keyboard from the port before proceeding.
10