In what format can I save a pack in the instrument,
so that if I want to add a new one afterwards,
then don't delete the previous one.
My other question is that in this case, if there are several packages,
I can delete one of them if I don't like it.
Overall, what is the difference between cqi, cpi, ppi backups?
My friend also has an SX900 instrument.
If I send him a multi-pack package, can he use it?