Hello Gilly,
I once had this misfortune
I thought I would like to stop the file being saved by turning the keyboard power off.
I payed the price and now know that you must not interupt the loadig or saving process

Hope other Forum members remember the punishment for interupting the action when saving ---- once you have asked it to save DON"T interupt it . .

Yes I had to do the hard thing and rename the SD Card names of song again .
It you have a power cut it probably does the same thing
These comments wont help you Gilly but a warning to other KN users

Dave L.