Encrypt your tablet
You can encrypt all the data on your tablet: Google Accounts, application data, music and other media, downloaded information, and so on. If you do, you must enter a numeric PIN or password each time you power on your tablet.
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Encryption is irreversible. The only way to revert to an unencrypted tablet is to perform a a factory data reset, which erases all your data (see“Privacy settings”on page 101).
Prepare for encryption.
Before you can start encrypting your tablet, you must:
●● Set a lock screen PIN or password (see“Secure your lock screen”on page 23) ●● Charge your tablet’s battery
●● Plug in your tablet
●● Schedule an hour or more for the encryption process: you must not interrupt it or you will lose some or all of your data
Open Settings and touch Location and security → Encrypt tablet.
Read the information on the Encrypt Tablet screen carefully.
You must not interrupt the encryption process or you will lose data.
The Encrypt tablet button is dimmed if your battery is not charged or if your tablet is not plugged in. If you change your mind about encrypting your tablet, touch Back 
.
Touch the Encrypt tablet button.
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