VMware ESXi allows you to create local datastores thanks to the VMFS file system, but also to connect to an NFS server or more often a NAS thanks to an NFS client.
This will allow you to store virtual machines or files on your NAS and use them from your VMware ESXi hypervisor.

To do this, go to "Storage -> Datastores", then click on : New datastore.

Then, select "Mount NFS datastore" and click Next.

Specify :

• Name : name under which this NFS share will appear as datastore in VMware ESXi
• NFS server : address of the NFS server or the NAS supporting the NFS protocol
• NFS share : NFS share path on the NFS or NAS server
• NFS version : selecting "NFS 3" will support all vSphere solutions, but the VMware ESXi NFS 4 client can support some features that are not supported by the NFS 3 client.

For more information about the features supported by the NFS 3 client and the NFS 4 client of VMware ESXi, refer to the "NFS and ESXi protocols" page of the official VMware documentation.

A summary of the NFS configuration is displayed.
Click on Finish.

The "NFS datastore [datastore name] succesfully mounted" message appears.
As you can see in the "Type" column, it says "NFS" instead of "VMFS".

If you click on its name, you will see informations about it, as if it were a local datastore.
Since your NFS share is now configured as a datastore, you will be able to access it through the location "/vmfs/volumes/[datastore uuid]" if you wish.