Ereasing backup

First - sorry my bad english, but i hope you will understand my issue.

I have some settings on my MP wireless pro, wich had made an automatic backup of my mac. I want to earase this - and use the harddisk as an music harddisk. But i cant be allowed earasing the backup. Even if i restore factory settings, it still is there.

Hello,

What software did you used to create the backup? See if you can disable the backup from the software to see if that allows you to erase the backup on the drive.