Why are there 4 discs in Elder Scrolls Online?

The four discs in "The Elder Scrolls Online" represent the game's four main factions: the Aldmeri Dominion, the Daggerfall Covenant, the Ebonheart Pact, and the Imperial. Each disc contains content related to the respective faction's storylines, quests, and environments, allowing players to immerse themselves in different aspects of the game's expansive world. This structure also helps organize the vast amount of content available, making it easier for players to navigate and experience the game.