Extra free 100 GB of backup space?

I've been a member of Norton Standard member for 2 months. Then I randomly got 100 gb of backup space. I don't remember buying anything and I didn't get any email from Norton about it. Did I get charged? And how do I cancel it, I dont need 100 gb of backup space.
I've only been a member for 2 months and still have 10 months to go.

You don't need to cancel anything. This is a bonus offer for users that have Automatic Renewal enabled for their current subscriptions. There is no additional cost. See this thread.  https://community.norton.com/en/forums/extra-100gb-cloud-backup-storage-no-extra-cost