@BrownieBatter48 try this thing then
https://vrmodels.store/other/scripts/479-unity-fbxexporter.html
its the only way to export .asset to fbx, but i think it breaks the UV and the topology of the model..
@deceased probably low disk space if you have old uploads go to your verchatprojects (personally mine is C:\Users\cherry\AppData\Local\VRChatProjects) and PERAMANTLY delete them as they are usually too big to put in the recycle