There are other threads about this problem that you can find with search.
You can work around it by formatting larger (64GB) cards as FAT32. Go4 will give you a warning saying "suggest format" but just ignore this and it will work.
Note to Windows users: the Windows GUI format utility (right clicking on the drive) will not let you choose FAT32 as a formatting option for a 64GB card. Instead, you'll either need to use the command line or a FAT32 utility
like this one. Also, FAT32 limits file sizes to a maximum of 4GB.