AMBERBEARD: Yarr. What be that? A memory stick?
FRANK: Aye. And Cheyenne's next album is on it. Plus bonus tracks.
AMBERBEARD: Cool! [ stabs Frank and takes memory stick ]
Now if Frank was dangling the memory stick over the side of the boat, or announced that it was encrypted, Amberbeard might have had reason to abandon her murderous intent. As things stand, it doesn't make much sense (but we do get to see Frank's palm buried in Amberbeard's cleavage).