This is a paid asset, but now you can download Asset Inventory for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Asset Inventory v1.5.0 (Latest version)
Asset Inventory v1.3.0
A lightning-fast search for assets OUTSIDE your current project. Find content in assets you purchased or downloaded WITHOUT IMPORTING and bring them in with a single click.
Eliminate the time-consuming task of finding a sound file, a texture or a model you know you purchased but which is hidden inside one of your many Asset Store purchases. The Asset Inventory provides a complete list of all assets you own, including their content.
➤ Powerful Search
Browse & find anything inside your purchased assets. Quickly preview audio files. Narrow your search using asset type, tags, image dimensions, audio length and more. Exclude items you don’t want to see. Save and recall searches.
➤ Easy Setup
Works out of the box. Lots of optional view & configuration options. Hassle-free indexing. Start, stop & resume at any time. Works with Unity 2019.4 and higher. Windows, Mac & Linux. Lightning-fast indexing and search.
➤ Intelligent Import
Import only what you need instead of a whole package. Automatically determines asset dependencies to import complex prefabs and materials. Save space & reduce clutter in your project. Bulk import multiple packages at once. Automatically store imported assets in a specific sub-folder and keep the Assets root clean.
➤ Many Sources
Your complete asset library: Automatically indexes Asset Store purchases. Triggers download of missing assets. Handles packages from registries. Supports custom folders to search through Unity packages downloaded from other locations. Indexes folders containing arbitrary media files like 3D models, audio libraries, textures and more. Automatically generates previews.
➤ Organize
Automatically imports labels from the Asset Store. Use additional tags to group assets effectively. Assign tags to either packages or individual files inside packages. Assign colors and group by tags. Exclude unwanted items. Perform bulk operations. Import multiple assets and packages in one go. Builds on Package2Folder to allow importing packages into a custom sub-folder.
➤ Reverse Lookup
Quickly identify used assets and packages in your project.
➤ Constant Updates & Support
Receive regular updates, optimizations, and new features. Super-fast support. Discuss ideas in a great Discord community.
Search index powered by SQLite
Use database simultaneously from multiple projects, even at the same time
Asset Store and custom locations
Incremental indexing, stop start and restart at any time
Hassle-free process
Easy one-window solution
Configurable result size and quick paging
Editor tooling, no runtime API
Full source-code included
Limitations
Dependencies can only be calculated in packages that use text/yaml serialization. A few legacy packages still use binary serialization, which is not supported right now.
Importing scripts is experimental and can produce console errors if the script requires other scripts to run.
Running the game view maximized on play and having the Asset Inventory window docked will cause it to reinitialize, resetting all search settings
Used Third-Party
SQLite – Public Domain
SQLite-Net – MIT license
RedCode AwaitExtensions – MIT license
EditorAudioUtils – MIT license
Package2Folder – MPL2 license