I faced a serious issue of resource crunch in data store recently, although I figured out that it was a snapshot that had overgrown and resolved it.
But I wanted to get the historical logs of DataStore events wherein I could find the exact point in time of the threshold breach and how fast did its size grow.
There is nothing that satisfies your current requirement unless, you already have vROPS configured in your environment. By default, even the datastore performance chart is only real-time. No historical logs available for the datastore usage. This is something that you will not get in the logs. Moreover, logging with respect to NFS is very minimal in ESXi.
Please consider marking this answer as "correct" or "helpful" if you think your questions have been answered.