Hello @herrmay,

Yes, it can be a bit cumbersome to write a whole abstraction layer, but most of the time it is avoidable to do that in the first place. In your case it should be pretty simple.

Iterate over all layers you want to save to disk. Get the MAXON_CREATOR_ID UUID of each layer and its data container. Write the UUID and the data container to disk using JSON or HyperFile, I would recommend the latter as it will be less work. You only must convert the UUID bytes to a string, put the string into the file, then the data container and you are done. If you want to, you could also store all layer data in one file per document, or just have one giant file for all documents. Later load these hyper file fragments back and do what you want with the data. When you need the original node, traverse the layers in the active document for a node with the stored UUID. You could also make things fancier and search in all open documents or even store the document path in your serialized data and load that document.

Saving things in the document container is a possibility too, you should make sure though to use a plugin ID for that.

Cheers,
Ferdinand

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