D a t a m a n a g e m e n t
Install an application
The .jar file is required for installing Java applications. If it is missing, the device may ask you to download it.
1To install an application or software package, select Installation files, and scroll to an installation file. Applications on the memory card are indicated
with 
.
2Select Options > Install.
Alternatively, search the device memory or the memory card, select the application, and press the scroll key to start the installation.
During the installation, the device shows information about the progress of the installation. If you are installing an application without a digital signature or certification, the device displays a warning. Continue installation only if you are sure of the origins and contents of the application.
Java applications may attempt to, for example, establish a data connection or send a message. To edit the permissions of an installed Java application and define which access point the application will use, select Installed apps., scroll to the application, and select Open.
After you install applications to a compatible memory card, installation files (.sis, .sisx) remain in the device memory. The files may use large amounts of memory and prevent you from storing other files. To maintain sufficient
memory, use Nokia PC Suite to back up installation files to a compatible PC, then use the file manager to remove the installation files from the device memory. See "File manager", p. 68. If the .sis file is a message attachment, delete the message from the Messaging inbox.
Remove an application
In the Application manager main view, select Installed apps., scroll to the software package, and select Options > Uninstall.
File manager
To browse, open, and manage files and folders in the device memory or on a memory card, select 
> Settings > Office > File mgr..
Back up and restore device memory
To back up information from device memory to the memory card or restore information from the memory card, in File manager, select Options > Back up phone memory or Restore from mem. card. You can only back up the device memory and restore it to the same device.