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