Space usage again

Seafile web panel shows 27GB usage.
Linux tells its 38GB used.
I’ve run few times GC.
We cleaned permanently trashes of all users.
So AFAIK the rest space is used by history files. Or something else ?
How to check which exactly history of files takes that space ?

And big ask to maintainers:
I think it is very important to have ability to check in web panel how much space is: used, how much space is in trash, how much space is in history AND where exactly it is in that history. That informations would really useful for all users of Seafile. Please consider it during developing next releases.