Yes: http://en.wikipedia.org/wiki/Dropbox_%28service%29#Technology http://en.wikipedia.org/wiki/Dropbox_%28service%29#Technolog... "Dropbox uses Amazon's S3 st

Yes: http://en.wikipedia.org/wiki/Dropbox_%28service%29#Technology http://en.wikipedia.org/wiki/Dropbox_%28service%29#Technolog... "Dropbox uses Amazon's S3 storage system to store the files"