If your memory full by favorite SMS in your Inbox and Sent Items and you want a backup in your memory card. Use SmsSuite for sms back up.
Downloand SMSbackup.sis (12KB)
How to use Sms Suite
1. After installation, Open SmsSuite from Applications. (SMS Backup/SmsSuite)
2. See your Saved SMS in your mobile (SMS Backup/SmsSuite)