YAMAHA SY99 with USB Drive, Rare Memory Expansion and More

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via this auction

"It has mounted a Special USB 2.0 Bay reader/writer instead of the old 720Kb Floppy Disk

THIS RARE USB BAY CAN WORK REALLY AS A FLOPPY, INSTEAD OF OTHER VERSIONS, THIS
CAN SAVE OR LOAD FILE ALSO UNDER DIRECTLY CONTROL FROM THE YAMAHA SY99 INTERNAL MENU!
NOW YOU CAN USE YOUR OWN SY99 WITHOUT THE NEED OF A COMPUTER NEARBY,
AND MORE WITH THIS VERSION YOU CAN USE ANY TYPE OF USB KEY

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YAMAHA SYEMB 05 ORIGINAL MEMORY EXPANSION (Ultra Rare)"

See the listing for additional details.