The thing about the 'indexes', Fran, is they are part of the Database functions. They have nothing to do with actual folders in any computer sense of the word, so you can't drag and drop like Yamaha do, or see them in any organizational sense on a computer... just the G70's display.
George (from what he said) seemed to be referring to the fact that the card, when formatted, has a bunch of folders on it. But they have no subdirectories WITHIN those folders. So ALL SMFs go into the 'Put New Songs Here', are processed by the Database, and get moved by the G70 into the Songs folder (ditto Styles). But there is no way, using a computer, to move them around, organize them or categorize them (Yamaha style).
This all has to be done by the Database, which is (IMO) a fairly unreliable POS that is WAY too easy to corrupt. And once corrupted, ALL your organizational work goes down the toilet. So, for me, the best, most reliable way to organize Songs and Styles is to use the UPG/UPS structure, which is much more robust.
But, for sure, there is more than one way to skin a cat... It is just that Roland's ways are VERY different from Yamaha's!
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An arranger is just a tool. What matters is what you build with it..!