At last - I´ve made it. My problem was this; I didn´t understand that the S-550 system disk had to be in the sampler in order to gain access to the correct menu! I always had the S-50 disk in the S-550 sampler when trying to convert and/or load. Simple - but yet so difficult! 1. Start the S-550 using the CD-5 system disk 2. Menu "disk", and choose "convert" with the system disk still inside. 3. After a while, the options apprear 4. Choose Load -> S-50 (or Convert -> S50) Execute! Then you can save the contents of the memory in the standard way to a S-550 floppy. Thanks for all the help. tw. :) "Those great moments come when musicians are playing together..." (Bob Moog)