Folder Info is a great application with which you can analyze the content of the folders in your PC. Just choose a directory to scan, and Folder Info will show you a detailed analysis with the space taken up on the disc, the subfolders included, when it was created, or how many files are inside.
Also, in the list in the lower left of the program, you can see which are the most common files inside the chosen folders, and their size and number. Folder Info also has a visual mode, in which you can easily see the space distribution in the storage discs.
Folder Info also lets you make powwerful searches for files in your PC, using filters according to the size they occupy, or the extensions they have. Also, all the results can be printed, or stored in a small report.