A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hello
You already get 5GB of storage for free by default for your OneDrive. If you need more than that, it is not free.
If you want to keep it free, you need to free up space in OneDrive to keep it below 5GB.
Log into https://www.onedrive.com
Then review the section in My Files. You can delete them from there.
Important - deletion from here will sync to all your devices, meaning, if the files are synced to your computer or phone, if you delete here, it will also delete on your devices.