You can buy the 30 day Bag's of Ghost Spirit in our in-game Marketplace, or there are bags you can craft in-game, but they won't be easy to make.
Also periodically we have events where you can craft or obtain event bags, but don't count on it if you want them any time soon. They're also non-tradable or storable.
Hey, Tyvm for the heads up, Can you please tell me which mobs/location in Kunlun I can farm the materials from? I've been really struggling due to some undeletable and unmovable/ items in the Bag, I cant get half the stuff in CCD Red/Black Dungeon and have to leave behind a lot :S