Hi @Dalo: Regardless of whether the packs actually work on the SX, the SX has 1 GB of expansion memory. It depends on how large the packs you want to put on it. In YEM you can see how large the packs are and whether they fit your Yammie model. You can also decide to make a selection of styles and / or voices from your packs and save them in a pack with your own name. How you can do that, pls. do a search in this forum or on the PSTutorial home e.g. 'making my own pack' .