Upload size is too large

Hey, I want to build a special map and need a lot of assets of Unreal Engine imported into UEFN. I have imported all of them but when I want to start the session I get the error that the upload size is too big. So I bought the same Fab package again only with the UEFN license. Now it is the case that the UEFN package contains much fewer assets, which doesn’t help me either.

However, I noticed that the assets from the UEFN are only in the folder and don’t need extra textures and material instances like the Unreal Engine version.
At least the UEFN assets don’t need them directly and are like embedded in the asset?

So my question was whether it is possible to change the Unreal Engine assets so that they are like the UEFN assets and therefore don’t take up so much disk space?

Thank you in advance for your answers! :smiley: