I.R.I.S. IRISCan Book 3 - Manual (Page 3)

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4
Format the microSD card
Some new microSD cards can only be used after formatting them. See section 3.
Choose the Scanner Settings to learn how to format the card.
3. Choose the Scanner Settings
Note: before you try to access the scanner settings, make sure the provided
microSD card is inserted in the card slot.
1. Press the button for 2 seconds to power on the scanner. The display
lights up.
2. Press once to access the scanner settings.
3. Use the up/down arrows to move to the required settings.
4. Then press Scan to open it.
5. Use the up/down arrows to move to the required setting.
6. Then press Scan again to confirm.
The settings you select appear on the display.