I have booted up my PC with Knoppix 3.8. When I tried to copy some files from my local HDD (/mnt/hde5) to my removable HDD attached on USB (mnt/sda1), an error message of "Could not make folder /mnt/sda1/Win2k_Ghost_Image" appeared.

Any idea why I failed to copy my files. Any solution for it?

Thanks & Best Regards