The aircraft involved, http://aviation-safety.net/database/record.php?id=20090601-0 http://aviation-safety.net/database/record.php?id=20090601-0 was built in 2

The aircraft involved, http://aviation-safety.net/database/record.php?id=20090601-0 http://aviation-safety.net/database/record.php?id=20090601-0 was built in 2005. The wiki tells me flash drives first became available in 2000. Perhaps my question is why aren't today's aircraft built with this sort of much more redundant system? Aircraft already have redundant hydraulics, redundant data, flight controllers, fuel tanks, engines, wheels, pilots, .... Why not have "inexpensive" redundant data recorders?