Was told by yuneec to use sd card from ST10+ Controller to update firmware. The other cards I have are 64 gb and I read where that is too big to use. I am unable to format the card that came with the controller on my mac using the disk utility. Stated: couldn't open device operation failed. I am running Sierra and tried to reformat in MS-DOS Fat. Also the update came in a zip file. After double clicking the zip I got a folder st10+v01b30c. Can I drag that file on to the SD card once I get it formatted. Do I need to open that file and drag each separately? Thanks for any info you may offer.