Settings
Battery
View how battery power is used for your various device activities.
◌From Settings, tap 
Battery and device care > Battery for the following options:
•Power saving: Save battery life by limiting background network usage, syncing, and location checking. Choose from additional power saving options to save more power when this mode is enabled.
•Background usage limits: View apps that you don’t use often and limit their battery usage. To disable this feature, tap Put unused apps to sleep.
•Usage since last full charge: View your recent battery usage by time, app, and service.
•More battery settings: Configure additional battery settings and notifications.
Storage
View your storage capacity and detailed usage by category and file type. You can also mount, unmount, or format an optional microSD card (not included).
◌From Settings, tap 
Battery and device care > Storage.
•Tap a category to view and manage files.
SD card
Once an optional microSD card (not included) has been installed in your device, the card is displayed in the Storage setting.
For more information, see Set up your device.
Mount an SD card
When you install an optional microSD card, it is automatically mounted (connected to the device) and prepared for use. However, should you unmount the card without removing it from the device, you need to mount it before it can be accessed.
1.From Settings, tap 
Battery and device care > Storage.
2.Swipe the screen to SD card, and then tap Mount.
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