In the storage settings of your Huawei device you will find the option to clean up your storage. You can choose between cleaning up Junk data, App data, Cache data and misc. datas. The system will suggest what should be cleaned/deleted.

Android 10 | EMUI 10.0
Clean up storage -  Open the  settings
Clean up storage -  Tap on  Storage
Clean up storage -  Tap on  Clean up
Clean up storage -  Choose a suggested  clean up  and tap on  Clean up
  1. Open the settings
  2. Tap on Storage
  3. Tap on Clean up
  4. Choose a suggested clean up and tap on Clean up

Huawei Instructions
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