Exports of file references and file reference metafields now return a comma-separated list of filenames rather than Shopify GIDs (for example, gid://shopify/MediaImage/...). This makes exported data much easier to read and is especially helpful when transferring data between stores, since filenames remain consistent even though GIDs differ between stores.
For imports, we continue to support all existing formats: Shopify GIDs, file URLs, or filenames.