Yeah if the items themselves are well defined in resource files then you can create an array of the paths and save that as a JSON string. Using a Dictionary for `datas` means you cannot have two of the same item (by `.name`); I don’t know if that’s intentional as it’s different from the `item_datas` as an Array which can store duplicates. Here’s an example of how I would read and write an array of strings in JSON. class_name InventoryData extends Node @export var item_datas: Array[ItemData] func create_save_string() -> String: var items_paths: Array[String] = [] for item in item_datas: items_paths.append(item.resource_path) return JSON.stringify(items_paths) func read_save_string(data: String) -> void: var json := JSON.parse_string(data) if json is Array: for path: String in json: item_datas.append(load(path)) else: push_warning("Couldn't read json: ", data)

Thanks for you guys reply. I think I know my problem now. inventory_data.gd class_name InventoryData extends Node @export var item_datas: Array[ItemData] func save_item_datas() -> Dictionary: var datas: Dictionary for items in item_datas: if items: datas[items.name] = items.resource_path return datas func load_item_datas(data) -> void: item_datas.clear() var item_counter: int = 0 for items in data.inventory_data: item_datas.append(load(data.inventory_data.values()[item_counter])) item_counter += 1 print(item_datas) I forgot that inventory supposed to be dynamic and I should save item in inventory individually, but I instead tried to save the whole inventory_data because it’s a resource. I think that is my problem.

I updated the code again in this reply. Help removing item from inventory array. Programming > I think something like that should work, this goes to your InventoryData class script. func remove_item(item_data: ItemData, quantity: int) -> bool: var counter: int = -1 for slot_data in slot_datas: counter += 1 if slot_data == null: continue elif slot_data.item_data != item_data: continue elif slot_data.quantity < quantity: continue elif slot_data.quantity == quantity: slot_datas[counter] = null print("SlotData removed") return true else: slot_data.quantity … I didn’t realize before that a `SlotData` item in the `slot_datas` array can be null, so I added checks for it now. The only scenario where it won’t work, which I think you might still need, is when you have the same item in multiple slots, e.g. 10 iron ores in slot 1, 20 iron ores in slot 2, and when you want to remove 30 iron ores - it’ll tell you you don’t have enough. You’d need to combine it into one stack for this to work. Let me know if you need this functionality to check all stacks, we can add it in. And in your calling function, you can check if the removal was successful by checking if the return value is true or false, that’s why I added the boolean return type. Instead of just calling the function like that: inventory_data.remove_item(item, 1) you can do that: if inventory_data.remove_item(item, 1): # removal was successful, so do something else: # removal was not successful, so do something else