About Compression - Blackberry Bold 9790 User Manual

User Guide
CAUTION: If you format your media card or built-in media storage, all of the data that's saved to your media card or built-in
media storage is deleted. Research In Motion recommends that you regularly create and save a backup file on your computer,
especially before you update any software. Maintaining a current backup file on your computer might allow you to recover
smartphone data if your smartphone is lost, stolen, or corrupted by an unforeseen issue.
1. On the Home screen or in a folder, click the Options icon.
2. Click Device > Storage.
3. Press the key > Format.
4. Complete the instructions on the screen.

About compression

Compression is designed to reduce the size of your BlackBerry smartphone data while maintaining the integrity of that data.
When compression is turned on, your smartphone can compress your data, including messages, contacts, calendar entries,
tasks, and memos. You should keep compression turned on.
If both compression and encryption are turned on, your smartphone compresses smartphone data before encrypting it.
About file encryption
File encryption is designed to protect files that you store on your BlackBerry smartphone and on a media card that can be
inserted in your smartphone. You can encrypt the files on your smartphone and on your media card using an encryption key
that your smartphone generates, your smartphone password, or both.
If you encrypt the files using an encryption key that your smartphone generates, you can only access the files on your media
card when the media card is inserted in your smartphone. If you encrypt the files using your smartphone password, you can
access the files on your media card in any smartphone that you insert your media card into, as long as you know the password
for the smartphone.
Turn on encryption
To encrypt data on your BlackBerry smartphone, you must set a password for your smartphone.
Depending on the amount of storage space available, you might not be able to encrypt files on your smartphone or on your
media card.
You can set encryption to include or exclude your contacts. If you turn on encryption for contacts and you receive a call when
your smartphone is locked, the encrypted contact information doesn't appear on the screen.
1. On the home screen or in a folder, click the Options icon.
2. Click Security > Encryption.
3. To encrypt data and files on your smartphone, in the Device Memory section, select the Encrypt checkbox.
4. To encrypt files that are stored on a media card, in the Media Card section, select the Encrypt checkbox and do one of the
following:
• To encrypt files using an encryption key that your smartphone generates, change the Mode field to Device Key.
• To encrypt files using your smartphone password, change the Mode field to Device Password.
Storage space and media cards
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