A plug-in that automatically finds and list unused assets in a project, and allow direct operation from the tool (move, delete, ect.). To help keep your project size and load time small, and avoid wasting time cleaning projects up.
Note - Only free during November 2021
Pack - Assets Cleaner - Project Cleaning Tool by The Tool Shed
Link - www.unrealengine.com/marketplace/en-US/product/assets-cleaner-project-cleaning-tool