Galaxy S9+ - How do I encrypt files on my SD card using my Samsung Galaxy S9+ (SM-G965W)?
Protect the data on your microSD card by encrypting it. Encryption is a mean to protect any data stored on your SD card. Once encrypted, only your smartphone can read the data stored on your SD card.
Note: Screens and settings available may vary depending on your Canadian wireless service provider and your software version.
Encrypt SD Card
Note: If you have a screen lock set up, you will need to enter your credentials.
Important: If you reset your device to the factory defaults with this setting enabled, the device will not be able to read your encrypted files. Disable this setting before resetting the device (follow the same path and touch "DECRYPT SD CARD").
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