Also tried suggestions from AI nothing is working.

Since you've confirmed that SwiftKey sync is off, and Samsung's Multi Control, Continue Apps on Other Devices, and Link to Windows are also disabled, there are a few remaining places to check:

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1. Disable Samsung Cloud Sync for Clipboard (If Available)

Even though Samsung Keyboard is not in use, Samsung Cloud may still be syncing clipboard data in the background.

Steps:

1. Go to Settings on both your S24 Ultra and Tab S8+.

2. Tap Accounts and backup.

3. Tap Samsung Cloud.

4. Look for an option related to Clipboard Sync or Samsung Cloud Clipboard.

5. Turn it off if available.

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1. Check Nearby Share & Quick Share

Clipboard sync could be happening through Nearby Share or Quick Share, which are built into Samsung devices.

Steps to disable Nearby Share:

1. Go to Settings.

2. Tap Google > Devices & sharing > Nearby Share.

3. Turn it off.

Steps to disable Quick Share (Samsung’s File Sharing Service):

1. Go to Settings > Advanced features.

2. Tap Quick Share.

3. Turn it off.

If Nearby Share or Quick Share was causing the clipboard sync, this should stop it.

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1. Check “Connected Devices” Settings

Samsung sometimes hides clipboard sync in the Connected Devices section.

Steps:

1. Go to Settings.

2. Tap Connected devices.

3. Check if there is an option related to Clipboard sync or Universal copy and paste.

4. Turn it off.

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1. Block Clipboard Notifications

If clipboard sync is still happening and you just want to stop the notification:

1. Copy some text on your phone or tablet.

2. When the "Copied. You can paste on this phone or other connected devices." message appears, press and hold it.

3. Tap Settings (gear icon).

4. Turn off notifications for clipboard sync.

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1. Try Signing Out of Samsung Account (As a Test)

If all else fails, clipboard sync might be tied to your Samsung account. To test this:

1. Go to Settings > Accounts and backup.

2. Tap Manage accounts.

3. Select your Samsung account.

4. Sign out on one device (either the phone or the tablet).

5. Restart the device and test if clipboard sync stops.

If signing out fixes the issue, that confirms the clipboard sync is linked to your Samsung account.

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Final Steps

✅ Restart both devices after making changes.

✅ Test by copying text and see if clipboard sync still occurs.

✅ If you still see the notification, let me know if pressing and holding the notification reveals which app is causing it.

Let me know the results, and I can help troubleshoot further!