Norton 360 PC backup issue

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Issue abstract:

Detailed description:
I have a issue with Norton backup process I set a backup parameter to do backups of my data. I don’t know exactly what I did but Norton has backed this data on my PC. It has used over 350 gigabytes of storage. I have seen solutions on how to delete backup data in the cloud but this data is stored on my PC main drive. I can use any help to delete this data off my PC. It’s a older Dell PC with windows 10.
Product & version number:
Norton 360 with Lifelock don’t know the version number.
OS details:
Windows 10
What is the error message you are seeing?
No actual error message from Norton. Just a windows message indicating my storage is almost full primarily from these norton backup files.
If you have any supporting screenshots, please add them: