I'm Trying to make that my items will be saved when i will leave, they are not saving?

so i was following this video :https://www.youtube.com/watch?v=HQQOgbkm14A

i did everything but it did not worked

local dataStoreService = game:GetService("DataStoreService") local datastore = dataStoreService:GetDataStore("BackpackSave")

game.Players.PlayerAdded:Connect(function(player) pcall(function() local tool = datastore:GetAsync("User-"..player.UserId) if tool then for i,v in pairs(tool) do local ToolFound = game.ReplicatedStorage.Items:FindFirstChild(v) if ToolFound then ToolFound:Clone().Parent = player.Backpack ToolFound:Clone().Parent = player.StarterGear end end end end) end)

game.Players.PlayerRemoving:Connect(function(player) pcall(function() local toolsSave = {} for i, tool in pairs(player.Backpack:GetChildren()) do if tool then table.insert(toolsSave,tool.Name) end end datastore:SetAsync("User-"..player.UserId, toolsSave) end) end)

im not asking for a free script, i just wanna know how to make it? my situation is that i made shop where i can buy items, when i buy item it will be added in my inventory but after i rejoin it dissapears i need help sorry for bad english