Hi ,
This will only work if you set up a shared user library in shared server.
The materials are downloaded are saved in the hard drive, meaning that when you open Twinmotion in a different PC they will not be available unless a shared user library is created.
More details on how to create a shared user library is available here: https://twinmotionhelp.epicgames.com/s/article/Twinmotion-Shared-User-Library
Cheers,
Francesco