Making backups is highly recommended—not just for NetNewsWire data but for all your important information.
NetNewsWire stores information in just two places. These are the things you should back up:
Preferences file: ~/Library/Preferences/com.ranchero.NetNewsWire.plist
Data folder: ~/Library/Application Support/NetNewsWire/
(Note: the ~ means Òyour home folder.Ó)
NetNewsWire does make some automatic backups—it stores copies of your subscriptions list in the ~/Library/Application Support/NetNewsWire/Backups/ folder. However, it’s still important to back up your data to another hard drive, CD, or other storage device, since the hard drive on your computer may fail.