Quick question, because I just can't find it on google. I have a 64gb micro Sd card (exFAT) which I want to split into two partitions. But it just won't work. The option to partition it is greyed out in Disk Utility, and I can't find a solution on google anywhere. The card needs to say in the exFAT format because I want to continue using it in my Sony camera. The reason it needs to be split in 2 (rather than just leave the photos in a separate folder on the card) is because Lightroom doesn't let me 'add' photos from the card to the Lightroom library since it recognizes it as a card that's used in a camera. So my plan is: take photos, save them on the card (I hope my camera will always 'pick' the right partition the save them on.) And every time I put the card in my MacBook, I'll transfer the photos from one partition to the other before loading them into Lightroom. It may seem cumbersome, but it really isn't, since a big card doesn't make me carry around a external hard drive. And saving them on my Mac isn't a great deal too with a 128gb ssd... I've looked into the Lightroom problem, which doesn't let me add photos from a sd card. It works perfectly great when they are on a external drive or usb stick. But Lightroom recognizes the camera folder structure and blocks you from importing from the card. So, I hope anyone knows whats up, why can't I just partition this card?