This is also happened to me after downloading 32GB of Twinmotion content for Twinmotion 2022.2 Preview 2 
for the moment I just use twinmotion content directly inside unreal 5.
- open content drawer
- settings (right side)
- check show engine content & show plugin content
- all 32GB files are located in Folder Engine - Plugins - Twinmotion content content (left side)
