We're already getting angry e-mails over this one. Just about every spec sheet everywhere on the Motorola Droid Bionic states that it has 16GB of on-board storage in addition to a 16GB microSD card. And that's true. But you don't get to play with it all.
Because of the way things are partitioned, and because the operating system takes up some of that internal storage, you won't actually see 16GB of internal storage if you look at the phone's settings. Instead, you have about 3.5GB of "application storage," which is where apps install by default. Then you have 8GB of "Internal storage," on which you can save photos, movies, music, etc. Apps also can store data here as well, so you'll likely see it decrease over time. Then you have the 16GB microSD card that comes pre-installed. (It can be increased to a 32GB card.)
So, realistically, you have 24GB of user-accessible storage memory, and not 32GB as you might think looking at the spec sheets.