My Passport - How override old backup and start new

I have 4 TB My Passport with folders backup from my old computer. I would like to use this drive to make a fresh backup of folders (pictures and Lightroom Catalog) from my new computer. I use WD Backup software, OS Win10. Another word how to delete from drive folders and files I don’t need anymore and start a new fresh backup.

I downloaded WD Drive Utilities software and used Drive Erase tool.

Way to go!