Pack save format?

[Pityus]

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?

[EileenL]

All deleting of packs id done via YEM. That is you make a new install pack with the tick taken out of the one you don't want. Most PPF files will load into YEM and the free packs that are marked for SX900. Packs for Genos will not load.

[ckobu]

In this 7-minute video, you will find answers to your questions.
Turn on English subtitles.
https://youtu.be/abOb0fUIC2Y