Encrypting the data on your microSD card adds an extra layer of security. It locks the information on your SD card to your device in it's current state. If it's lost, stolen or removed, the files won't be read even if it is moved onto another device or computer.2021-10-18
How do I delete secure files on Android?
Go to Settings > Security > Advanced and tap Encryption & credentials. Select Encrypt phone if the option isn't already enabled. Next, go to Settings > System > Advanced and tap Reset options. Select Erase all data (factory reset) and press Delete all data.2020-11-08