Hey @sebstof33 – When the Preload feature is activated in WP Super Cache, it undergoes a two-step process. First, it generates new cache files by overwriting the existing ones for each page as it progresses. This ensures that the cache is updated with the latest content.
Once the generation process is complete, WP Super Cache attempts to delete any remaining old cache files that predate the preload. In other words, it tries to remove any old files that were not overwritten during the generation phase. This step ensures that the cache remains fresh and relevant.
Therefore, to address your initial question, activating the Preload feature in WP Super Cache results in the overwriting of old cache files for each page and the attempted deletion of any remaining old files that predate the preload. Consequently, old files will either be overwritten or purged during this process.
I hope this clarification provides a better understanding of how WP Super Cache handles cache files when the Preload feature is activated.