6GB *.m2t file on my PS3, how to copy it to ext hard drive(or anywhere else?)

[quitemouse]

a few months ago, I had a 6GB *.m2t video file. it was a HDV video that
I shot at a birthday party. I couldn't copy it on a FAT32-formatted ext hard
drive and hook it up to my PS3, so I burned the file on a DVD-DL. I inserted
the DVD-DL and copied the 6GB file to the PS3's internal hard drive.

unfortunately, I lost the original file on my PC and I no longer have that
DVD-DL. it now only resides on the internal hard drive inside my PS3...

is there a way to copy that file to another device? ext hard drive
won't work, because of the 4GB limit...