If you, like many others, started playing Fortnite on PS4 then tried to move over to Switch when the game got a port back at E3 2018, you may have run into a problem. Due to a restriction imposed by Sony, any Fortnite account which had ever been used – even once – to play the game on PS4 couldn't be used on an Xbox One or Switch version of the game.
As a result, a lot of players (including myself) created a second Fortnite account so they could play the game on a second device, even though doing so meant leaving a primary username and earned items behind. Now, finally, there's a fix for this situation.
Thanks to Fortnite's new account merge tool, players can now log into two different Fortnite accounts, decide which one should be their primary account, and transfer all their V-Bucks and items to the chosen account. They can then use this new account on any version of Fortnite without worry.
There are a few conditions imposed on account mergers, but they all make sense. One of the accounts being merged must have played on Xbox One or Switch before September 2018, and the other account must have played on PS4 before September 2018. This merger tool is specifically designed to help people affected by the Sony account lockdown issue, and will not help you merge two unrelated old accounts.
Additionally, banned or disabled accounts can't be merged, which just seems like common sense.
Finally, while cosmetic items, V-Bucks, and save the world XP will transfer, battle royale progression levels and XP will not make the leap, so you might want to wait until the start of a new season to merge your accounts
Transfers to your new primary account will take around two weeks, which will cause a short period in which you might have to play with default skins, but it's a small price to pay to avoid having to play with the word 'Switch' appended to the end of your usual online gamer name.