Is there a better way to save an infinite inventory?

local datastore = game:GetService("DataStoreService"):GetDataStore("Inventory")
game.Players.PlayerAdded:connect(function(plr)
	local key = "user_" .. plr.UserId
	local items = datastore:GetAsync(key) or {
		Slot1 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot2 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot3 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot4 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot5 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot6 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot7 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot8 = {
			item = "",
			amount = 0,
			image = 0
		}
	}
	local inv = plr.PlayerGui:WaitForChild("Inventory").InvFrame:GetChildren()
	for i,v in pairs(inv) do
		if not v:IsA("Script") then
			v.Item.Value = items[v.Name].item
			v.Amount.Value = items[v.Name].amount
			v.ImageId.Value = items[v.Name].image
			if v.Item.Value ~= nil and v.Amount.Value ~= 0 and v.ImageId.Value ~= 0 then
				v.ItemImage.Image = "http://www.roblox.com/asset/?id=" .. v.ImageId.Value
				v.ItemAmount.Text = v.Amount.Value
				v.ItemLabel.Text = v.Item.Value
			end
		end
	end
	local function save()
		datastore:SetAsync(key, items)
	end
	for i,v in pairs(plr.PlayerGui.Inventory.InvFrame:GetChildren()) do
		if not v:IsA("Script") then
			v.Amount.Changed:connect(function()
				for index,value in pairs(items) do
					if index == v.Name then
						value.amount = v.Amount.Value
						save()
					end
				end
			end)
			v.Item.Changed:connect(function()
				for index,value in pairs(items) do
					if index == v.Name then
						value.item = v.Item.Value
						save()
					end
				end
			end)
			v.ImageId.Changed:connect(function()
				for index,value in pairs(items) do
					if index == v.Name then
						value.image = v.ImageId.Value
						save()
					end
				end
			end)
		end
	end
end)
game.Players.PlayerRemoving:connect(function(plr)
	local key = "user_" .. plr.UserId
	local items = datastore:GetAsync(key) or {
		Slot1 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot2 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot3 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot4 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot5 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot6 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot7 = {
			item = "",
			amount = 0,
			image = 0
		},
		Slot8 = {
			item = "",
			amount = 0,
			image = 0
		}
	}
	for i,v in pairs(plr.PlayerGui.Inventory.InvFrame:GetChildren()) do
		if not v:IsA("Script") then
			items[v.Name].item = v.Item.Value
			items[v.Name].amount = v.Amount.Value
			items[v.Name].image = v.ImageId.Value
		end
	end
	datastore:SetAsync(key, items)
end)

As you can see, I list every slot 1-8 in the DataStore table, is there anyway where I don't have to do that, and can just have an infinite inventory save without having to keep on adding Slots to the table?

Help appreciated, thanks!

Just use an array.

You don't need to give the slots "names" like .Slot1, .Slot2, just use [1] [2]`, etc.

When you need a new slot, just add it in. You don't need them all to be there at the beginning.