Selective File-Sync is a feature that should be included within Adobe Creative Cloud Storage. If team members access one folder to collaborate, all files should not download as there could be GB's worth of files, especially video files. There is no need to fill up other team members local storage if they won't be using assets at the moment but could potentially at any moment.
There should be a selective Sync to determine what gets downloaded to the device for offline usage versus a system similar to Google Drive's File Stream' where files are downloaded on demand [1].
Adobe has had selective Sync before [2] and others have requested this many times [3]. Adobe has also acknowledged this as something under consideration since 2016 as per Lin He (an Adobe Employee) who responded on Jun 14, 2016 [4]. Brett N, an Adobe employee has also stated this is a great feature to add in his post on August 5, 2014 [5].
Per Adobe’s UserVoice, this is most upvoted feature under ‘Desktop Sync’ category with over 372 votes [6]
-----------
[1] https://support.google.com/drive/answer/10838124?sjid=8053267328791237940-NA
[2] https://blogs.adobe.com/cssdk/2014/11/how-to-choose-which-creative-cloud-shared-folders-you-sync.htm...
[3] https://community.adobe.com/t5/creative-cloud-desktop-ideas/selective-file-sync/idi-p/13198220
[4] https://community.adobe.com/t5/creative-cloud-services-discussions/selective-sync-for-creative-cloud...
[5]
https://community.adobe.com/t5/creative-cloud-services-discussions/can-you-selectively-sync-files-fo...
[6]
https://creativecloudassets.uservoice.com/forums/905290-request-features/filters/top?category_id=319...