Nokia N900 User Giude page 11

Insert the memory card
Use only compatible MicroSD cards approved by Nokia for use
with this device. Nokia uses approved industry standards for
memory cards, but some brands may not be fully compatible
with this device. Incompatible cards may damage the card
and the device and corrupt data stored on the card.
The memory card can be safely inserted or removed even
when the device is switched on. When you open the back
cover, the device cannot access the memory card, to protect
the data on the card. When you replace the back cover, the
memory card is accessible again.
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A memory card may be already inserted in the device. If not,
do the following:
1 To prevent the battery from coming loose, place the
device so that the back cover is facing up.
2 Place your finger in the grip, and lift the back cover up.
You do not need to press any button to release the back
cover.
3 To release the memory card holder, slide the holder
towards the battery (1), and lift up the end of the holder
(2). Insert a compatible memory card into the holder (3).
Make sure the contact area on the card is facing the
connectors on the device. Close the holder (4), and slide
it back to lock it into place (5).
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