That is all the Musikant PA4X styles. There are also sets from the 3x, 900, 600 versions. Some of them have different styles of course.
I can send you the dual tempo jazz style if it's not there.
.rar is simply a compression, like .zip. Most zip programs can open them. I use 7-zip. It's free.
You will need to unzip the folder on your computer, copy to USB and then load onto the 900. You can load entire set, or "drill" down til you get to the individual styles and try them one at a time. You can select the destination, or let them automatically load into User locations. Go to Media, Load, toggle to USB and find the style.
I then Copy the ones I want to keep into Favorite locations, and in some cases, copy them to Factory locations.
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DonM