Exfat
format your sd card as ExFat.. That will let you use it to store files larger than 4gb. I currently have a 32gb card formatted as ExFat and have 3 1080p movies at about 6-8gb each loaded. works great and I dont notice any slowedowns becuase of the format type.
give it a go, just backup your card first and then copy it all back after you have formatted! :good: