Torriatte,

I think the frustration is; one, due to the fact that Linux ( Knoppix ) is NOT windows, and thus, does not do like Windows does, its a little different. Two, people are trying to help you, but, to help, the best we can, we need information on your situation. So, when someone is asking for something, we are basing a "solution" on the information provided...

Harry is working on the premise that you said the systems were "Windows", windows uses, at last count, five different formats; fat, fat16, fat32, VFat, NTFS - of these formats, Linux has problems with those that are "proprietary", like NTFS - So, if your drives are formated as NTFS, you might have problems anyway. But, lets assume, since you aren't answering that "posted" question, that they are in fat / Vfat, and proceed...

Knoppix doesnt work the same way as your Windows, lets get that out of the way first. You dont click on a shortcut on the desktop and drag it, thats a Windows thing, not Linux. Those shortcuts for your drives, on your desktop, in Knoppix, are not the PHYSICAL drive, but, simply shortcuts, if you did manage to copy one, all you would be doing is copying the shortcut, not the data on that shortcut. To copy the "data" you have to do things a little differently, in Knoppix...

First thing, Knoppix 101:
If a shortcut to a drive, on your desktop, has a little corner in the bottom right, it means the drive is mounted, or openned, if it doesnt have this, it is possibly not mounted.

Knoppix opens things with one mouse click, left button, and gives "options" when you right click. If you left mouse click on a drive shortcut, if the drive is not mounted, it will try and mount the drive, before displaying its contents in a window.

By default, Knoppix will ALWAYS mount a drive as READ-ONLY -=- this is, by nature, for your protection, and the protection of your drives.

To accomplish a copy of data, from one drive to another, you will need to do a combination of mounting, and changing the write mode, from READ-ONLY to READ & WRITE, on your target drive - the one that you want to move / copy the files to...

Lets get you working:
RIGHT-CLICK on the drive that you want to copy the data TO, or, the TARGET drive.
If you have an option to MOUNT the drive, then select that, if the option does not show up, or an option saying "UNMOUNT" is available, then the drive is already mounted.
Now, RIGHT-CLICK on that same drive, this time, look for the option "Make Writtable", or something like that, and select that. That drive SHOULD now be able to be written to.
LEFT-CLICK on the FROM drive, the one that is "defunct" and you want to copy / move data off of. This should bring up a window of the disks contents.
LEFT-CLICK on the TO drive, the one that we want to copy / move the data to, and the same drive we did all the above operations on. This should also bring up, another, window of the disks contents.

Now the copy move process:
In the window that displays the DEFUNCT drives contents, RIGHT-CLICK on a file you want to copy / move, and choose either COPY or CUT ( copy will make a copy of the file, and cut will "ultimately" move the file )

Go to the window that displays where you want to copy / move the file to, navigate through the folders, or create any folders, till you are where you want that file to go. Then, RIGHT-CLICK and select PASTE. The file should either now exists in both locations, or be deleted in the FROM / SOURCE and only exist in the TO / TARGET ( depending on if you wanted to copy, or move, the file )

Do this process for every file, or folder, you want to...

When you are done. You need to unmount the drives, first, close the two windows you were using to view the contents of the two drives. Then, RIGHT-CLICK on each of the drives icons on the desktop, and select UNMOUNT from the options. Do this for both shortcuts to your drives.

I think this should do what you want,
Hope this helps,