Works, but also fills internal storage

So I had 6 GB free space in internal. I had a 4 GB folder.  I ran the command for moving it and it worked. But it didn't free up internal storage space. 
I first symlinked the folder then downloaded the 4 GB data. I moved to the symlink on the internal storage. Maybe that is the problem?
I disabled the module and it still shows 6 GB.