You can back up data easily on your Android Froyo mobile device. The data backup can then be restored automatically.
To backup your data:
Go to Applications > Settings > Privacy > Mobile backup and Restore > check Back up my data.
To restore the data automatically:
Go to Applications > Settings > Privacy > Mobile backup and Restore > check Automatic restore.
NOTE: When re-installing applications, the backed up settings and data will be restored automatically when the Automatic restore option is checked.