Geoff. Maybe forget about converting those ones you have bought for the moment. If you are just looking for more Styles that will work on your PSR-S700 then in the
PSR Tutorial Website you will find this:
Yamaha provided a utility, Voice Converter for Tyros2, that can convert T2 styles to a format that can be used on the PSR-S900 and PSR-S700. We applied that utility and converted 3,123 styles that PSR-S900/S700 owners can use to increase their style libraries. The style sets are provided in the zip files shown in the table below.
So there you go.
Another 3,500 STYLES you can have on your PSR-700.
This is where you will find them. It says for PSR-900 but they also work on yours, the PSR-700. This is definitely the place to go to get more STYLES for your PSR-S700 keyboard.
Do a right-click to open this up in a New Tabhttps://psrtutorial.com/sty/yamaha/psr-s900.htmlScroll down the page until you see the below (the below is just an 'image' of what's on the website page, so you can't click on the words below), and click on one. All the downloads are ZIP files, so you'll have to UNZIP them. Are you OK at doing that? If not, I can UNZIP them for you and give you a LINK where you can download them from 'as is'.
Scroll down a bit more and there are these.
And there are even more further down.
3,500 more STYLES should keep you going for a bit!Hugh