I don't know exactly what you're storing or how much sorting you need, but if it's simple id = article to recall the basic data I'd say just use text files. Sometime simple works.
- article121.txt
- article1441.txt
- ... etc
Alternatively, in the same vein you could use JSON files
- article121.json
- article1441.json
- ...etc
Contents of JSON could contain values for title, body, etc (if needed).
If you need to sort or search them directly I'd say SQLite probably.