User guide

BlackBerry device memory

The BlackBerry® device memory consists of various sections that store user data and sensitive information such as keys. Third-

party applications on a BlackBerry device cannot write to or access the sections that store sensitive information.

Section Description

flash memory The flash memory is a file system that is internal to the BlackBerry device. The flash

memory stores application data and user data. You cannot physically remove the

flash memory from the BlackBerry device. Sections of flash memory can store files

that a user downloads or saves.

on-board device memory The on-board device memory stores files that a user saves on a BlackBerry device.

The BlackBerry device uses and exposes the on-board device memory similar to the

way that the BlackBerry device uses and exposes a media card.

When you or a user permanently deletes all device data, the BlackBerry device

deletes the files from the on-board device memory, except for the system memory

partition, which includes sample pictures and sample tunes.

NV store The NV store persists in flash memory, and only the operating system of the

BlackBerry device can write to it. Third-party application code cannot write to the

NV store.

media card The media card stores files that a user saves using a BlackBerry device.

You or a user can save, access, and encrypt files on the media card from the

BlackBerry device. When you or a user permanently deletes device data, the

BlackBerry device does not delete the files from the media card unless the

BlackBerry device is running BlackBerry® Device Software version 5.0 or later.

Changing when a BlackBerry device cleans the BlackBerry device memory

By default, the memory cleaner application runs on a BlackBerry® device when the BlackBerry device is inactive for a specified

period of time. You or a BlackBerry device user can change when the memory cleaner application runs when any the following

conditions exist:

• The BlackBerry device user synchronizes the BlackBerry device with a computer.

• The BlackBerry device user locks the BlackBerry device.

• The BlackBerry device locks after it is inactive for a specified period of time.

• The BlackBerry device user changes the time or time zone on the BlackBerry device.

Security Technical Overview

BlackBerry device memory