What is your question here, Jan?
A Pack Install file can only contain content up to the maximum available size of the Expansion Wave memory of your keyboard. For example, the Genos has 3 GB of Expansion Memory, but with the SX600 you have to live with about 100 MB...
P.S.
If desired, you could of course make several different Pack Install files (using different file names) on the USB stick. But you can only install ONE of these files at a time. (When installing another Pack Install file all previous installed Expansion content is automatically DELETED from the keyboard.)
And of course you can deselect unneeded content of several Packs in YEM, so that the overall needed size is below the maximum possible size for your keyboard.
Best regards,
Chris