Why isnt this replicatedStorage / DataStore script working?

In Replicated Storage, there is a folder (named Classes) and inside that are 5 bool values named custom 1-5(customs 1,2,3,etc..). I have a textbutton that has a local script that is supposed to save the name of a gun into a primary(string value) which is inside each custom bool value. Inside ReplicatedStorage there is remoteevents that saves the data to the customs, but I dont think I did it right. I also want it to save for each player that does it. There is a script in server script storage that tells the remote events to save it. I just want it to save the name of the textbutton into primary.

Textbutton script:

local player = game.Players.LocalPlayer
local SaveClass = game.ReplicatedStorage:WaitForChild('SaveClass')
local function onClicked()
SaveClass:FireServer("Bal-27 AE") -- that will send "Bal-27 AE" to the remoteevent, the remoteevent will save that stat
end
script.Parent.MouseButton1Click:connect(onClicked)

Server Script Storage SCript:

local Data = game:GetService("DataStoreService"):GetDataStore("DataStore")
local function SaveClass(Player, Name)
Data:SetAsync(Player.userId..' Player', Name)
print("success")
end
game.ReplicatedStorage.SaveClass.OnServerEvent:connect(SaveClass)