How do I save the contents of a backpack to a dictionary

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1

Hello, I am currently trying to make it so that when a player presses J, they do a hands raised animation, and their backpack saves and clears, and then gives gives back the items when they click J again.
I have worked out the animation part, so the script is going to have unrelated things, but I just need help on the parts with comments.
(note that I got help on this script, and don’t 100% understand it)

local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Backpack = game:GetService(game.Players.PlayerName.Backpack)

local Surrender = ReplicatedStorage:WaitForChild("Surrender")

local animation = Instance.new("Animation")
animation.AnimationId = "rbxassetid://15687971905"

local surrenderedPlayers = {}
local surrenderAnimations = {}

Surrender.OnServerEvent:Connect(function(player)
	local humanoid = player.Character and player.Character:FindFirstChildWhichIsA("Humanoid")

	if not humanoid then
		return
	end

	local hasSurrendered = surrenderedPlayers[player]

	if hasSurrendered then
		surrenderedPlayers[player] = false
	else
		surrenderedPlayers[player] = true
	end

	if surrenderedPlayers[player] then
		local surrenderAnimation = humanoid.Animator:LoadAnimation(animation)
		surrenderAnimation:Play()

		surrenderAnimations[player] = surrenderAnimation

		-- Save and then clear backpack 
	else
		surrenderAnimations[player]:Stop()

		-- Give items back
	end
end)

Players.PlayerAdded:Connect(function(player)
	player.CharacterRemoving:Connect(function()
		surrenderedPlayers[player] = nil
		surrenderAnimations[player] = nil
	end)
end)

I know that I have to use the dictionary to save it, but thats about it.

2

Make it so it fires an event to a server script when you press J and then the server script takes all the stuff from the backpack and put it in server storage inside a folder with the name of the player or user id. And when J pressed the server script will take everything from the folder back to the backpack. No dictionary needed.