If you specifically require version 2.70, follow these steps, as the main download page usually offers only the latest version:
Select the packs you want, then click "Save as Pack Install File" to your USB drive. yamaha expansion manager 270 upd download
Yamaha Expansion Manager V2.7.0 for Mac . Key Changes in Version 2.7.0 If you specifically require version 2
Yamaha Expansion Manager (YEM) version 2.7.0 was a significant update that streamlined content management for arranger workstations by introducing support for newer models and "Quick Installation" features. Direct Download Links If you specifically require version 2.70