iDiskPro can show you very useful information about your disks (their size and free space) as well as the memory information in a handy form. Moreover, it transforms the specified folder into 'disk'. It simplifies your relocations through a folder structure. It is very easy to go to the right folder after the pseudo-disk creation - just choose the 'disk' P: in the File Manager (or in the Open File dialog in any Application) and you are there. You can also define start-up profile, and select disks you want to be added at system start-up.
||Free to try
||EPOC, Nokia 92xx communicator