

Look for Message History and tap Keep Messages – you can select Forever, 1 year or 30 days. There is also a “Keep Messages” option in Settings > Messages.Or you can tap the Edit button in the top left-hand corner of Messages and delete messages that way.To delete messages you can swipe from right to left on a message in the Messages list and choose Delete.

There are a few ways to reduce the size of your iMessage library. Deleting some of your iMessages – especially the ones with lots of photos might solve the problem (but note that images sent via iMessage won’t automatically appear in your Photos app). If your Messages app has a lot of photos and videos it might slow down a bit. How to send and receive text messages on Mac and
