Fortnite Chapter 4 Season 2 not only adds new content to the game but also changes the Vault locations in the game. The Vault is a treasure room concealed behind unbreakable walls, where players need a keycard to access and open the Vault door.
Every season the location of the Vaults is changed along with the process of getting the keycards. In Chapter 4 Season 2, there are a total of four Vaults; here are the complete details to find keycards and open Vault in Fortnite:
All Fortnite Chapter 4 Season 2 Vault Locations
As mentioned before, to access Vault, you must acquire a keycard; in Chapter 4 Season 2, the keycard is obtained by defeating the Highcard Boss. The Highcard Boss spawns with his two henchmen after the first storm circle. Currently, the Highcard only spawns in three locations around the Vaults in MEGA City, Brutal Bastion, and Shattered Slabs.
The MEGA City is in the Southeastern part of the map, whereas Brutal Bastion is on the Northern side of the map and has a Snow Biome, and Shattered Slabs can be located on the Western side of the map.
Once you defeat the boss and obtain the keycard, equip it and follow the marker, guiding you to the nearest Vault. Once you reach the Vault, you can access it by interacting with the Vault keycard access.
Apart from these three vaults, another Vault can be found on Loot Lake Island. The Loot Lake Island can spawn different locations on the map; therefore, you must watch it to find the Island. As the name suggests, Loot Lake Island will provide you with loads of different loot but also has a secret Vault under the House on the Island. But to open the Vault, you must have two normal keys.