Disable sync for specific files located in the windows sync box folder

Hello, I'm using the box sync windows 4.0.8016 application.
In the folder configured for sync there are 9 files in different subpaths that cannot be uploaded online because they are too heavy. Every time I start the PC, the application works to load these files for about 10 minutes, occupying about 20% of the CPU. To work around this, is it possible to exclude specific files from synchronization?
I would not like to place these files outside the box sync folder because they are files that are good to stay inside these subfolders.
I await your kind reply.
Andrew