Samsung WAVE II GT-S8530 - Manual (Page 16)

Assembling 16
Replace the battery and back cover.
4
Do not remove a memory card while the device is
transferring or accessing information, as this could
result in loss of data or damage to the memory card
or device.
›
Format the memory card
Formatting your memory card on a PC may cause
incompatibilities with your device. Format the memory
card only on the device.
In Menu mode, select Settings
→ Memory → Memory
card details → Format → Yes.
Before formatting the memory card, remember to
make backup copies of all important data stored on
your device. The manufacturer’s warranty does not
cover loss of data resulting from user actions.