Problem with expansion packs

[drvenom]

Hi again, everybody.
First of all, to say that I am very satisfied with the purchase of the PSR sx900.
I am enjoying this great keyboard very much and I recommend it to anyone who cannot afford the great Genos.

My question is about expansion packs.
I have several, and every time I install one, I delete the previous ones.
Is there any way to install more than one, or is it a limitation imposed by Yamaha?
Through the Expansion Manager, I have changed the lb bank of some to see if I could get several at once, but it has not resulted (I don't know if it is the right thing to do it this way)
I would greatly appreciate the help.
Greetings to the whole community

[ckobu]

You need to create one * .ppi file that will be a compilation of several different * .ppf (Pack).
Watch the video.

https://youtu.be/qlrOx-t7zyI

[EileenL]

You must make sure you have ticks in the packs you want on your install file and then either save to USB or send wirelessly to keyboard.