Furuno GP-3500 - Manual (Page 153)

10. RECORDING & PLAYING BACK DATA
10-3
3-5. FORMAT MEMORY CARD
FORMAT MEMORY CARD 1. YES 2. NO
SELECT "YES" BY TRACKBALL TO START THE FORMAT.
Format memory card menu
7. Press the [1] key to select “1. YES.”
The following message appears.
START FORMATTING
MEMORY CARD.
ARE YOU SURE?
YES ... PRESS KNOB
NO ... PRESS CLEAR KEY
8. Press the [ENTER] knob.
The message “NOW FORMATTING MEMORY CARD” appears. When the
formatting is completed, the message “FORMAT COMPLETED. PRESS KNOB
TO CONTINUE.” appears.
9. Press the [ENTER] knob.
Note: If you insert a mini chart card in the left slot, an error message
appears. After pressing the [ENTER] knob, insert a memory card and
then retry the formatting.
10. Press the [MENU] key several times to close the menu.