I have an Octavia estate 2010 and I have music on an sd card and it was working perfect Yesterday

I took out the card and put it into my mates car for a few in and when I put it back into mine it just keeps saying please wait 

I tried a second sd card and its saying the same 

 

Is there any way of resetting the radio or how will I fix it any help be grate cheers 

have you tried with a freshly formated card with one track on it just to see if it had been corrupted 

 

or even trying the card in a pc and running error check