Whats the best way to datastore GUI values?

So I have an inventory GUI and I want to make it save what's in your inventory on death.

I've seen the ROBLOX Wiki for datastores but I'm not sure how I would apply that to a players' GUI.

I've already set up a data store for a player stats and what works fine but here's me trying to save inventory values:

game.Players.PlayerAdded:connect(function(Player)

    local playerKey = "player: "..Player.userId

    local savedValues = DataStore:GetAsync(playerKey)

    if savedValues then
        for i, v in pairs(inventorySlots) do
            wait()
            v.Ammt.Value = savedValues[1]
            v.EquipVal.Value = savedValues[2]
            v.Rarity.Value = savedValues[3]
            v.slotValue.Value = savedValues[4]
        end
    else 
        local valuesToSave = {v.Ammt.Value, v.EquipVal.Value, v.Rarity.Value, v.slotValue.Value}
        DataStore:SetAsync(playerKey, valuesToSave)             
end
end)