Short answer: delete message attachments on iPhone by reviewing the heaviest conversation media first. The goal is to remove old videos, screenshots, voice notes, and image-heavy threads that still take space, not to wipe out useful conversations blindly.

Message attachments become a separate storage problem because they live outside the simple “camera roll cleanup” mindset. People often clear photos and still wonder why the phone feels full. One answer is that Messages can still be holding large attachments the earlier cleanup never touched.

What to do first

  • Review the largest message threads and attachment-heavy conversations before smaller chats.

  • Start with old videos, duplicate sends, screenshots, and low-value reference images.

  • Keep active conversations intact if the real problem is attachment weight rather than the message history itself.

  • After the Messages pass, review whether those same images or videos were also saved into Photos.

Why message attachments keep storage full

  • Heavy videos and screenshots often get sent, saved, and forgotten.

  • The same media can exist in both Messages and Photos.

  • Old conversations may still hold large files even when you never open them anymore.

  • Message storage is easy to overlook because it does not feel like part of normal photo cleanup.

Where Cleanor helps after the Messages pass

If the same media also lives in Photos, the next win usually comes from grouped photo-library review. Cleanor for iPhone is useful once message clutter turns into normal duplicate photos, screenshots, similar shots, and heavy videos in the library.

What people usually ask next

  • Should I delete whole chats? Only if the conversation itself no longer matters. Often the smarter move is removing heavy attachments first.

  • Why is storage still full after deleting photos? Because Messages, downloads, and app media may still be taking room.

  • What should I clean after Messages? Saved screenshots, duplicate videos, and old photo-library clutter are usually the next passes.

If your phone still feels full after cleaning Messages, continue to Why iPhone storage stays full after deleting photos. If the issue has moved into Photos, open How to free up iPhone space.

Message cleanup works best when you remove attachment weight first and only delete whole conversations when they truly no longer matter.