We have the locations for Dead Drop locations, Blacklist Laptop locations, and HVT locations in Splinter Cell: Blacklist. There are 24 Dead Drop flash drives in the game, 23 Blacklist laptops, and 20 high value targets in the game.
The videos can be found below. These videos are courtesy of YouTube user PowerPyx, and are complete.
Dead Drop locations:
Blacklist laptop locations:
High value targets: