Want to transfer games

I have backed up my gta 4 copy using mmcm. I don't know how to transfer games bcuz the backup is iso format and I can't paste it to my ntfs( yes I have enabled it ) usb which has 32 gb free it only shows copy and create shortcut on the usb section where it should show paste iso

Ftp is super slow only 1 mbps and gets disconnected frequently so it's unreliable, are there any other ways I could do this