Do UAssets need the original FBX or File Texture to operate or are they completely independent translated information?

Development Asset Creation
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1

Just curious if I should be setting up my project directory to have all the texture files and the UAsset files together. I’m not sure if they reference them or need them for any dependencies.

2

UAssets are independent from original files.

3

Is that true for all U ASSETS including rigs and geometry?