If you turn off Messages in iCloud, your iMessages and SMS messages will no longer be automatically synced across all of your Apple devices that are signed in to the same iCloud account. Instead, your messages will be stored locally on each device and will not be updated in real time when you send or receive a message on another device.

Turning off Messages in iCloud may be useful if you want to conserve storage space on your iCloud account, as messages can take up a significant amount of storage space over time. By turning off Messages in iCloud, you can ensure that your messages are only stored locally on each device and not uploaded to iCloud.
However, there are some potential downsides to turning off Messages in iCloud. First, you will no longer be able to see all of your messages across all of your devices in real-time. If you send or receive a message on one device, it will not automatically appear on your other devices unless you manually sync your messages.
Additionally, turning off Messages in iCloud may impact your ability to use certain features, such as Continuity and Handoff, which allow you to seamlessly transition between your Apple devices while using certain apps, including Messages. If you turn off Messages in iCloud, you may not be able to use these features as effectively.
Finally, if you turn off Messages in iCloud, you may lose access to some of your message history if you switch to a new device or if you need to restore your device from a backup. Messages that were not synced to iCloud may not be restored, so it’s important to make sure you have a backup of your messages before you turn off Messages in iCloud.
To turn off Messages in iCloud on your iPhone, iPad, or iPod touch:
- Go to Settings.
- Tap your Apple ID at the top of the screen.
- Tap iCloud.
- Scroll down and turn off the toggle switch next to Messages.
To turn off Messages in iCloud on your Mac:
- Open Messages.
- Go to Messages > Preferences.
- Click on the Accounts tab.
- Uncheck the box next to “Enable Messages in iCloud.”
Keep in mind that turning off Messages in iCloud is a personal choice and may impact how you use your Apple devices. It’s important to weigh the benefits and drawbacks of turning off Messages in iCloud before making a decision. If you’re unsure whether turning off Messages in iCloud is right for you, you may want to consult with Apple support or an IT professional.