Fortbyte #4 has been added to the Fortnite map. The location of Fortbyte #4 is actually in the sky above Loot Lake. However, to get this Fortbyte to appear, you will need to have the Plasma Contrails equipped to your character.
If you have the Plasma Contrails equipped you should be able to see the rings
The Plasma Contrails are an unlockable item in the Season 9 Battle Pass so you will want to have the equipped if you want to collect this item. Once you have the Plasma Contrails equipped you will be able to see the rings above Loot Lake. To get Fortbyte #4 you will need to fly through the rings. On the final ring you will unlock Fortbyte #4 and complete the challenge.
The important thing to remember when trying to get Fortbyte #4 is that you need to have the Plasma Trail item equipped to your character. It is unlocked at Tier 89 on the Battle Pass. You will need to manually equip this item on your character via the Locker. Doing this is the only way that you can make the rings appear above Loot Lake.
During the course of Season 9 in Fortnite there will be 100 Fortbytes unlocked through completing different challenges. Grabbing 90 Fortbytes will unlock the Singularity Skin. If you need help tracking down some of the other Fortbytes in the game, we’ve compiled a comprehensive guide of all Fortbyte locations for Fortnite Season 9.