I have all my individual SD cards on one single SD card, containing the order of 800 technics folders of professionally produced files but you need a pda or similar handheld pc to make use of them all without a laptop or desktop.
The 1 GB card has 14 named folders in the root, e.g. Technote, Non technote, HB Soft, Algo, Sequences, etc etc, each with the corresponding PRIVATE folder inside and a simple name file to identify the contents of that private folder in the portable screen.
Only one private folder is allowed in the root of the sd card at any one time (otherwise you would be overwriting), to change contents I slip the card into my handheld and using the windows explorer type function move the private folder and the name file back inside it's named folder and move another private folder and it's name file to the root of the card.
This effectively swaps sd cards, and the whole process literally only takes a few seconds because the move operation does not move any files at all (which could take a long time writing on a slow card with much contents) but only rewrites a few location pointers in the file allocation table each time, so is very quick indeed.
The KN7000 cannot see the named folders and thus only sees the current private folder in the root normally for KN7000 operations. The name file is there purely for me to see which private folder is which when looking on the portable screen, and to know which named folder to return it to before moving the next private folder (effective whole sd card) out to the root.
Thus though the KN7000 can only see one card of 99 folders at a time, I don't have to carry around the 9 or 10 various 64MB/128MB/256MB themed and organised cards and have all those same contents on a single card which works fine in the 7k.
I do the same thing with midi files and the sd_sound folder to get much more than 999 midi files on the single card.
[This message has been edited by technicsplayer (edited 05-17-2008).]