Sandisk 32gb Extreme Problem

AK P

Honorable
Sep 24, 2013
30
0
10,530
Hi, I currently use a 32gb Sandisk Extreme 45mb/s Class 10 card with my Canon 600D. The other day I lent the card to a friend to transfer a few of the photos on to his computer, when I received the card back it could no longer be read by my 600D or my Ipad (2). However when I insert the card into my PC I can view all the pictures and nothing has been deleted.

I'm guessing his computer might have changed the format of the card. How can I fix the card so it can be read by my camera and my ipad again without losing the pictures stored on it?