Staggered file versioning - hdd space usage

Dear all!

I couldn’t find any information about the hdd space usage when using staggered file versioning. Does syncthing “Just” copy the new versions or are they saved incrementaly to save space. For example: creating a 1GB file, changing it and it will be versionized - does this Action need 2GB of hdd space?

Thanks for your help! Best

They aren’t saved incrementally.