Inside your Dropbox folder is a hidden cache folder that stores deleted files locally on your computer for faster restores. If you use Dropbox a lot, this cache folder can eat up valuable HD space. Here’s how to erase those files.
Windows: If you just want to do a folder size analysis without all the radial graphs and eye candy that many popular folder scanners sport, GetFoldersize gives you the information you need in a simple and straightforward interface.
Windows only: A little sloppy file keeping can lead to a lot of duplicate and space-hogging files. Dig up all the dupes with speedy Fast Duplicate File Finder.