Hi Folks,
The new SX900 will come with four packs already loaded onto memory. As we all know if you then want to load any other packs from YEM it will format the memory so you would lose these packs. Yamaha have put these packs onto the site so that you can download them ready for when you get the new keyboard. Therefore you will be able to load these back in with any others you may want to use. The SX900 has 1Gb of memory in it.
Eileen
https://europe.yamaha.com/en/products/musical_instruments/keyboards/arranger_workstations/psr-sx900/vse.html#product-tabs