You can customize the Content Browser: https://dev.epicgames.com/documentation/en-us/unreal-engine/content-browser-in-unreal-enginehttps://gamedevexp.com/unreal-engine-content-browser/
I've wrote some general tips for help to find things easily in unreal here: https://aljavgames.notion.site/Find-anything-fast-in-Unreal-b1d800ad6ba5426e8ee951e38588abd1?pvs=74 its geared towards general game development but might still be some helpful ideas even if you only use it for storing assets
can you describe the needs in more detail? my first reaction is that you can just make an unreal project for that. how you back it up is totally flexible, can handle that like any other project. but as for viewing and searching for assets, dont think you find anything more convenient for unreal. and you can just migrate to…