Sharp AQUOS Crystal - Manual (Page 406)

Settings 397
7. Touch Erase everything.
Data saved on microSD card is encrypted.
SD Card Encryption Cautions
Files on SD Card can be encrypted with Encrypt microSD.
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Encrypted SD Card cannot be recognized by any device other than your phone used for
encrypting the SD Card.
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Encrypting SD Card prevents files on that SD Card from being accessed by other people (e.g.,
when your handset is lost).
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Even when encrypted SD Card is removed from your phone then inserted into another phone or
connected to a PC via an SD Card reader/writer, files on the encrypted SD Card cannot be
accessed from the device.
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Performing Encrypt microSD deletes all SD Card files.
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To disable encryption of SD Card and use it normally, perform Erase SDcard and then Reset
all. Note that files on the SD Card will be deleted.
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Once used for encrypting SD Card, your phone cannot be connected to a PC in MTP mode or
PTP mode.
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SD Card becomes read-only when inserted into your phone that has been used for encrypting
another SD Card.
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To write to read-only SD Card, perform steps in Format SD Card . Note that files on the SD Card
will be deleted.