I'm pleased to announce that I have a new product in the Ovi Store: Grovr Folder Sizes.
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.
Folder Sizes also allows you to easily delete entire folders and files just by highlighting them and pressing the Delete button.
Grovr Folder Sizes comes in a 10 day trial of all functionallity here and the full unrestricted version here costing 1 Euro or equivalent.
Grovr Folder Sizes is available for Symbian^3 phones such as the N8 and Symbian 5th Edition devices such as the 5800 Express Music.