If you or your organization have a requirement to prevent your data from being synced to our Cloud, you have the option to disable Sync at any time. Just head to the Sync tab in the Settings menu, then click 'Disable Sync'. Please note that you will need to manually back up your data if you have Sync disabled.
If you need your data to be removed from our servers, you can email us at email@example.com - please include your username/email associated with your account.
Please review the relevant documentation on Sync here.