Data Store not working any help?

This data store is suppose to save Items that are put directly into your startergear in game. But it isn't working. And I do not know why.

Here is the script:

local key = 'weps'   
local exclude = {   
    'GameMusicHuman, GameMusicInfected, LobbyMusic, CamControl, NoNames, ToggleFlashlight, ToggleSound';   
}    
game.Players.PlayerAdded:connect(  

function(p)   
        local weps = data:GetAsync(p.userId..'_'..key)   
        if weps then  
            for _,v in pairs(weps) do 
                if game.ReplicatedStorage:FindFirstChild(v) then  
                    game.ReplicatedStorage[v]:clone().Parent = p.StarterGear   
                end   
            end  
        end   
        p.StarterGear.ChildAdded:connect(   
            function(c)    
                local tools = { }  
                for _,v in pairs(p.StarterGear:GetChildren()) do  
                    local add = true   
                    for _,c in pairs(exclude) do   
                        if v.Name ~= c.Name then  
                            add = false  
                        end 
                    end  
                    if add then  
                        table.insert(mo, v.Name)   
                    end  
                end  
                data:SetAsync((p.userId..'_'..key),  tools)    
            end  
        )   
    end  
)  

Would this help?

local store = game:GetService("DataStoreService"):GetDataStore("data")
local http = game:GetService("HttpService")

local Convert = function(data) 
	if type(data) == "string" then 
		if pcall(function() http:Decode(data) end) then 
			return http:Decode(data) 
		else 
			return data 
		end
	elseif type(data) == "table" then 
		return http:ncode(data) 
	elseif type(data) ~= "userdata" and type(data) ~= "thread" then 
		return data 
	else 
		return nil,warn("Cannot convert "..type(data)) 
	end
end

local a = {
	save = function(self,key,value)
		if key then
			if type(key) == "string" then
				if value then
					local value = Convert(value)
					if value ~= nil then  
						if store:GetAsync(key) then
							store:UpdateAsync(key,function(old) return value end)
							return store:GetAsync(key)
						else
							store:SetAsync(key,value)
							return store:GetAsync(key)
						end
					end
				else
					if store:GetAsync(key) then
						return Convert(store:GetAsync(key)), warn("No value given to save")
					else
						return nil,warn("No value given to save")
					end
				end
			else
				return nil, warn(key.." is an invalid key")
			end
		else
			return nil,warn("No key given")
		end
	end;
	load = function(self,key)
		if key then
			if type(key) == "string" then
				if store:GetAsync(key) then
					return Convert(store:GetAsync(key))
				else
					return nil
				end
			else
				return nil, warn(key.." is an invalid key")
			end
		else
			return nil,warn("No key given")
		end
	end;
	setStore = function(self,name)
		if name and type(name) == "string" then
			store = game:GetService("DataStoreService"):GetDataStore(name)
		end
	end
}
return a