Grovr Folder Sizes solves the problem of working out where all the space has gone on any of the drives on your phone. It does this by summing up the total size of all the files and subfolders inside a folder for all of your folders and then displays that information in a normal drive view as shown below.
See where the disk space on your phone is going. This is a 10 day trial of the app, full version also available on Ovi Store. If you're running out of space or just want to have a Spring clean, Folder Sizes shows you the total size of all the files and subfolders inside a folder so that it's easy to locate where the space on your phone is used up. You can then easily delete the files and folders you don't want. You can drill down as far into the file system as you like.