Unable to find the memory card decryption menu in Settings
Problem:
After an encrypted
memory card is inserted into the phone, the user finds that there is no
memory card decryption menu in Settings and therefore there is no way to
decrypt the memory card to access the files on it.
Solution:
Troubleshoot the issue according to the possible causes of it:
The memory card was encrypted on another phone.
Insert the memory card into the phone on which it was encrypted in the first place, then decrypt the memory card.
Your phone has been force reset to factory settings after encrypting the memory card.
For security
reasons, a phone that has been force reset to factory settings will have
all data erased and won't be able to decrypt the memory card. This
design ensures your data security, especially when your phone is lost.
The data on the memory card won't be restored. You need to format the
memory card before using it again.
EMUI 5.X: Go to Settings > Memory & storage > Storage > SD card > Format.
EMUI 8.X or later: Go to Settings > Storage > SD card > Format.
A phone that has
been reset to factory settings (as opposed to a force factory reset) can
still decrypt the memory card. To reset your phone to its factory
settings, back up your data, open Reset phone, search for and access Reset phone, then follow the onscreen instructions to complete the task.
If you go to Settings > System > Reset > Reset phone to reset your phone to its factory settings, it is not a force factory reset.
A force factory reset is performed using any of the following methods:
Resetting your phone to its factory settings via Recovery or eRecovery mode.
Resetting your phone to its factory settings using a third-party app.
Erasing data using the Find My Phone feature.
The memory card or the files on it are damaged.
Hot
swapping the memory card may damage the card and cause decryption
failures. Encrypted data on a damaged memory card won't be able to be
restored. You need to format the memory card before using it again.
EMUI 5.X: Go to Settings > Memory & storage > Storage > SD card > Format.
EMUI 8.X or later: Go to Settings > Storage > SD card > Format.
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