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Use Device Maintenance on Galaxy Note8

Keep up with the nuts and bolts of your phone’s performance. Device maintenance provides an overview of the status of your battery, storage, RAM, and security. You can also automatically optimize your phone's system resources.

The available screens and settings may vary by wireless service provider and software version.

Quick Optimization

The Quick Optimization feature improves the phone's performance through the following actions:

  • Identifying apps that use excessive battery power and clearing unneeded items from memory.

  • Deleting unnecessary files and closing apps running in the background.

  • Scanning for malware.


  1. Navigate to Apps > Settings.

  2. Touch Device maintenance.

  3. Touch OPTIMIZE NOW.

  4. Touch DONE.


Battery is your phone’s lifeline. Learn about the various ways you can change battery settings to optimize the battery life.

  1. Navigate to Apps > Settings.

  2. Touch Device maintenance.

  3. Touch Battery.

  4. The following options are available: 

    • Battery usage: View details of battery usage by item.

    • Power saving mode: Extend battery life by selecting a power saving mode. Choose OFF, MID, or MAX. Estimated remaining battery life for each mode is provided.

    • App power monitor: Put apps to sleep so that they do not use battery power when not in use.

    • Unmonitored apps: Select apps to exclude from being put to sleep by the App power monitor.

    • More Options > Advanced settings: Configure advanced battery settings.


We all have our go-to apps on our phones. Learn how to enhance your phone’s performance to meet your needs.

  1. Navigate to Apps > Settings.

  2. Touch Device maintenance.

  3. Touch Performance mode.

  4. Choose one of the following options:

    • Optimized (recommended): Balance battery life and screen resolution for everyday use.

    • Game: Enhance your gaming experience by making games run more smoothly.

    • Entertainment: Enjoy music and videos with ultra high quality sound and enhanced images.

    • High performance: Experience the highest quality display settings.


If you are worried about your phone being overloaded with unnecessary data like cached and residual files, it’s about time you clear out your storage. Here’s to happy cleaning.

  1. Navigate to Apps > Settings.

  2. Touch Device maintenance.

  3. Touch Storage.

  4. Touch CLEAN NOW to free up storage space by deleting unnecessary data, such as cached, residual, and advertisement files.


Is your phone getting glitchy and slow? Learn how to clean up your phone’s memory to improve performance.

  1. Navigate to Apps > Settings.

  2. Touch Device maintenance.

  3. Touch Memory.

  4. Touch CLEAN NOW to free up memory by stopping background apps.

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