Added support for handling OMA DRM 1.0 protected files.
Starting from S60 3rd Edition the root for common directories
is c:/data/, whereas before S60 3rd Edition it was c:/nokia/.
Starting from S60 3rd Edition the protected directory in
memory card is private/, whereas before S60 3rd Edition
it was system/.
Increased the size of the internal write buffer which speeded up the write operations to the memory card.