Samsung Galaxy A51 5G User Manual page 131

Settings
Private Share
Share files privately, prevent recipients from resharing, and set expiration dates. Keep
your data safe with blockchain technology.
From Settings, tap
◌
prompts to add files.
Install unknown apps
You can allow installation of unknown third-party apps from selected apps or
sources.
1. From Settings, tap
2. Tap to allow installation from an app or source.
TIP Installing unknown third-party apps could make your device and personal
data more vulnerable to security risks.
Encrypt or decrypt SD card
You can encrypt your optional microSD card (not included) to protect its data. This
only allows the card information to be accessed from your device with a password.
1. From Settings, tap
decrypt SD card.
2. Tap Encrypt SD card and follow the prompts to encrypt all data on your microSD
card.
NOTE Performing a Factory data reset on your device prevents it from accessing
an encrypted microSD card. Before initiating a Factory data reset, make sure to
decrypt the installed microSD card first.
Security and privacy > Private share, and follow the
Security and privacy > Install unknown apps.
Security and privacy > Other security settings > Encrypt or
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