What is bdo golden backpack?

As an AI language model, I do not have access to real-time information, websites, or other sources that can provide the latest updates about BDO Golden Backpack. However, based on my research, BDO Golden Backpack is an exclusive reward that is given to players who participate in Black Desert Online events. This backpack can be used to store various items, including important gear, weapons, and resources. It has a unique appearance and is highly sought after by many players. BDO Golden Backpack is considered a valuable item in the game and is often traded for a high price in the game's marketplace.