The Galaxy Note 8 comes with 64GB of internal storage. While that's going to be enough for some users, most users will just pop in a microSD card. If you're using one, here's how you encrypt Galaxy Note 8 microSD card. You should certainly do it if you want to keep the data on the card secure.
The data that's stored on the internal storage is secure as long as your phone is locked. You can secure it using various features, including but not limited to facial and iris recognition. That protection doesn't extend to the microSD card as it can simply be removed by ejecting the SIM tray. They can then pop it in another device or in a computer and get access to all of your data.
If you encrypt Galaxy Note 8 microSD card, then the data will only be accessible via the phone when it's unlocked. It will have to be decrypted first before it can be used with another device.
You will not be able to use the microSD card elsewhere before decrypting it on the Galaxy Note 8. Follow the same steps in reverse to decrypt it.
How To Encrypt Galaxy Note 8 MicroSD Card
Step 1: Launch the Settings app on your Galaxy Note 8 and tap on Lock screen and security
Step 2: Scroll down to locate the Encrypt SD Card option
Step 3: Tap Encrypt SD Card to begin the process. If you use one, you will have to enter your password or pattern for the process to begin.
Do keep in mind that encryption can take an hour or more, it depends on how much content is stored on there. Ensure that there's adequate juice in the battery and keep the device plugged in until the process is complete.
The microSD card can't be used during the encryption process. If the device is reset to factory default settings, it will be unable to read encrypted microSD cards.
It's simple enough to encrypt Galaxy Note 8 microSD card but if you face any problems, do ask for help in the comments below. While we're on the subject, here's how you move apps to microSD card on Galaxy Note 8.