Storing grain for multiple years was possible for a long, long time. The Bible story of Joseph is perhaps an exaggeration or an extraordinary event, but storing

Storing grain for multiple years was possible for a long, long time. The Bible story of Joseph is perhaps an exaggeration or an extraordinary event, but storing grain from "good" years in order to consume it in "bad" years is something we've been doing since prehistoric times, we have archeological evidence that this has been done in Egypt before writing was used.