The Note (N7000/7005) only has a 2GB partition for apps. Some apps cannot be moved to Sd (actually not external SD card).
Sometimes, the excessive storage usage is due to cache used. You can use some apps to free the storage, for example, ES Task Manage can do a decent job. https://play.google.com/store/apps/details?id=com.estrongs.android.taskmanager
In Application Manager, you can sort apps by size (tap the menu button).