I haven't used TC in a long time but don't you determine the size of the volume/container when you create it, not when you put data into it? That would mean it'

I haven't used TC in a long time but don't you determine the size of the volume/container when you create it, not when you put data into it? That would mean it's entirely believable that you created a larger (1TB) volume with future use in mind but have yet only had a need for a part (50GB) of it.