How Crossposting Plugins Work with Images
Before we continue, let me clarify how both of my crossposting plugins actually process the images (or any other files).
| Type of attachment | How it is processed by the plugin |
|---|---|
| Featured Images | Will be copied to sub-sites with their data (just once). If an image with the same filename exists, it will be used instead. Read this if you need to use original images (for the multisite version of the plugin only). |
| Images in post content | As long as the post content only holds image URLs, the plugin does nothing with them. So, there is no need to duplicate every post image from the article (there could be hundreds of them) as long as we can use their original URLs. We also win in performance. But the not-multisite version of the plugin has an option in settings to copy the content images to subsites. |
| Images or any files in custom fields (added with ACF or any other plugin) | Usually attachments stored in custom fields as their IDs. By default plugin does nothing with them, but if you activate this free add-on, then images will copied to subsites. |
| Images or files in ACF blocks | They are supported with this free add-on. Images are going to be copied to subsites. |