My Canon point n' shoot and my Macbook Pro always seem to be in conflict when uploading the SD card. At times I have to insert the card several times to get the upload process to start. Afterwards I keep the photos instead of deleting them and wait until I put the card back into the camera to format it. But after awhile I'll get a memory card error on the camera and it will not allow me to format it. In the disk utility feature, is there a preferred format I use to restore the card so it will work better on both devices? Thanks.