How do I name a Folder something with code in it and stuff in ""?

So i made a script to make a folder in SoundService. Its erroring with

ServerScriptService.OnJoining.Script:7: attempt to call a string value>

Im pretty sure its something simple

The script is in ServerScriptService

local Players = game:GetService("Players")
local SoundService = game:GetService("SoundService")

Players.PlayerAdded:Connect(function(plr)
	local Folder = Instance.new("Folder")
	Folder.Parent = SoundService
	Folder.Name = plr.Name" Sounds"
end)

I tried searching if someone had the same problem as me, Im pretty sure there is one but just titled differently from what im looking up.

In line 7, you didn't add concatenation, which is ".." used to connect strings. The game thinks you are calling a method because doing

plr.Name"Sounds"

is the same as doing

plr.Name("Sounds")

Instead you should use concatenation. This is an example

local a = "Hello"
local b = "World"

print(a..b) -- prints "HelloWorld". It connects "Hello" (a) with "World" (b)

print(a.." "..b) -- this prints "Hello World". It connects "Hello" (a) and then connects a space which makes the string into "Hello " and then connects it with "World" (b) which makes the string into "Hello World"

Here is your code with the correction

local Players = game:GetService("Players")
local SoundService = game:GetService("SoundService")

Players.PlayerAdded:Connect(function(plr)
	local Folder = Instance.new("Folder",SoundService)
	Folder.Name = plr.Name.." Sounds" -- Sets the folder's name to "[PlayerNameHere] Sounds", Because it connects the player's name and then connects it " Sounds" or basically "[PlayerName] Sounds"
end)