Disklavier

I bought a beautiful Yamaha 5'2" grand, love it.  It came with a Yahaha
Disklavier DKC100R unit (the one that uses the floppy disks), and the
original owner had it wired up underneath with an amplifier, speakers,
really nice.  The original owner also gave me a few dozen floppies of
various genres which I have enjoyed immensely.

 

About 6 months ago the unit was generating an error every time I would put a
different disk in.  I took a handful of the disks that it failed with, down
to the local dealer, where each of them played just fine.  So the tech came
out and made some adjustments to the unit, then they worked fine.

 

Now 6 months later, the same thing is happening, and its not from overuse
because the number of times I've used the unit since the tech was here 6
months ago can be counted on one hand.

 

Perhaps it needs an upgrade?  What would you suggest?  A new disk drive?
Upgrade to CD?  (Yikes, $1700!)  Or am I further ahead to get something
where I could put a thumb drive into a USB port and have it play music from
there?  If the latter, does the thumb drive need to be formatted in a
special way so that the unit can read it?

 

Thanks!