Clean storage to make free space with compress and optimize videos and images, you can delete unusable application and files sorted by size.
Also try to scan your phone applications with security section.

Device System Management - Optimize videos/images and scan applications security.

Analyse your all of your device files and applications, images and videos listed by size and you can try to optimize your media files.

Scan sector by sector of your storage with files categorized by modification date and file size list, you can easily open video files and optimize or delete unusable files.

File manager have this options:
Create new directory to custom path
Rename files
Multi select file to delete, copy, zip, share, ...

Optimizing video and image files, with keeping quality.
For example:
Video file with "1.4 GB" size after optimized update to "138.2 MB" and about "1.3 GB" free space made to my storage just with one file.
Image file with "21.8 MB" size after optimized update to "8.5 MB" and about "13.3 MB" free space made to my storage just with one file.
Also here you can find damaged video files which one in the list rows have a red background.

Security Scanner:
Checking applications status of signatures and availability in Google Play Store.
Also you can monitor applications with dangerous permissions easily and uninstall unusable apps.