Nokia 5310 XpressMusi EN - Manual (Page 37)

The password is stored in your phone, and you do not
have to enter it again while you are using the memory
card on the same phone. If you want to use the memory
card on another device, you are asked for the
password.
To remove the password, select Options > Delete
password.
Check memory consumption
Check the memory consumption of different data
groups and the available memory to install new
software on your memory card.
Select the memory card
and Options > Details.
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