Hi Jan and welcome to the Forum
A backup facility is provided in the software which was included with your KN7000/KN2600 (Applications and Drivers CD). The application used is 'Song Manager'. You can use either a card reader connected to the USB port of your PC, or you can connect your keyboard via USB to your PC and backup the card, while it is fitted in the keyboard. However, the latter method takes a very long time........
If you have not already installed the software on your PC, then it is important that you follow the installation procedure very carefully. You will find a detailed procedure for Windows 98SE or Windows 2000/XP on the Tech Tips page of my website : http://mysite.freeserve.com/willumspages/index.html
The backup process produces a single compressed file with the extension .SDB and this file can be stored in a folder on your PC and subsequently written to a CD if required.
The backup procedure is fairly straightforward.
1. Plug the Card Reader into your PC USB port and start the Song Manager program.
2. Insert the SD Card in the reader and in the Menu at the top of the screen, click on SD Manage.
3. Click on SD Backup from the drop-down Menu and follow the instructions.
4. When you get to the 'Save as..' screen, enter a suitable name for the file (eg 128MB_Card01 )and click on Save.
5. On the 'SD Card Selection' screen, choose 'Card in Reader/Writer'.
6. On the 'Browse for folder' screen, click on 'Removable Disk' - the backup process will start and activity will be shown by the yellow LED on the Reader/Writer.
7. When the backup has finished, it will indicate 'Completed' on the PC screen - click on 'OK'. Be aware that the process will take quite some time.......
You will then have a single compressed file containing all the data on the card.
If you do wish to transfer this data to another SD Card, rather than save it on your PC or CD, then the .SDB file can be uncompressed and the contents copied to a 'backup' SD Card using the 'Restore' facility in the Song Manager. The procedure is similar to that described above except that in Step 3. you would choose 'SD Restore' rather than 'SD Backup'
There is also a program called 'SD Explorer' produced by a member of Synthzone which provides several useful facilities for KN keyboard data manipulation. Further details are available here : http://members.chello.nl/~f.mellink/SDExplorer.htm