Hi have a Windows machine. It's crashed. It's going to get wiped and Linux is going on top of it.

Before I do that, I need to get the data off it. I have a Maxtor USB drive. Knoppix can see it and I can read the data on the Maxtor, however, when I try to copy data to the Maxtor, it fails.

How do I tell a Knoppix Live distro how to enable desktop copying?

It mounts the drive as:
/mnt/sda1

Thanks for any help and advice.