well 4.7 ( not 4.2) for a disk .Sometimes a dvd will only hold 4.6 and the rest is cutoff .
Quote:
I usually transfer movies to an external USB memory
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is the usb a fat32 format if so then there is a 4 gig ( 3.99 gig) max file size .
a larger file will be wrote to it but the end of the file will be gone .