Beakybird, Yes 25 floppies are too much. The idea I had was to first store the new OS on the internal HD of the Tyros. This can be done through the USB with a PC. This may take a long time ( 3 hours ! for 40 MB with the slow Midi transfer rate of 30 kbit/sec). If this transfer is interrupted by e.g. a power failure, you can simply restart it. No harm was done, except the wasted time !

After that you should be able to start the flash update from the internal HD of the Tyros. This should be much faster, thus reducing the risk of interruption.

I would be very interested to hear from Yamaha whether the Tyros supports the above mentioned procedure.

Kari