Leica M 240 Instructions Manual page 111

Notes:
• Simple formatting does not cause the data on the card to be
irretrievably lost. Only the directory is deleted, which means that
the existing files are no longer directly accessible. The data can
be accessed again using appropriate software. Only the data
that is then overwritten by saving new data is actually
permanently deleted. You should nevertheless get into the habit
of transferring all your pictures onto a secure bulk storage
medium, e.g. the hard drive on your computer, as soon as
possible. This is particularly important if the camera is being
sent for servicing along with the memory card.
• Depending on the memory card used, formatting can take up to
3 minutes.
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