I suspect that the dominance of Hard Disk Drive usage in this poll is of no big surprise to most Slashdot viewers. That being said, HDDs easily win the capacity race, at least for now. SSDs are rapidly catching up, and their speed blows away that of a traditional hard disk. Unfortunately, SSDs are also much more costly per GB (or GiB if you prefer) of storage... so most of us pick the big and cheap option. I also think that SSDs will become much more common as built-in parts of tomorrow's computers - notebooks especially, and also smaller devices (netbooks, media players, and tablets). Desktops will most likely be the last to adopt SSDs in great numbers, due to most desktop buyers wanting lots of power and lots of local storage.