Store data generated in editor...?

I have an actor (C++ based) that creates decals in the editor. (A grid, basically). I override OnConstruction and PostEditMove of an AActor and generate per-tile data.

I want to save this information, so that when I run the actual game it just loads the per-tile data that I’ve calculated in the editor. Is this a good use case for a Data Table / Data Asset? (which one?) I’m planning to have up to 1,000,000 of these things at a time…