Getting vector data to persist from Play in Editor into package

I found this thread:
https://www.reddit.com/r/unrealengine/comments/cmsbn4/help_how_to_store_dynamically_created_data_using/
In the final post the OP mentions “asset data” solved their issue (which was identical to mine)

Am I correct that “asset data” is different from the “Data assets” I mentioned in last post?

I tried finding out how to use “Create Asset Data” but there is next to nothing about it and I haven’t a clue how to use the node and what Uobject subclass to use it with!

Any pointers would be hugely appreciated
A stab in the dark also welcome!

Cheers
Graham