Step 1: Open Server Manager, select “File and Storage Services”.
Step 2: Right click on “Server”..
Step 3: Click “Add Roles and Features”.
Step 4: Click Next.
Step 5: Click Next.
Step 6: Click Next.
Step 7: Expand File and Storage Services, expand File and iSCSI Services, select “File Server Resource Manager”.
Step 8: Click Add Features.
Step 9: Click Continue.
Step 10: Click Next.
Step 11: Click Next.
Step 12: Click Next.
Step 13: Click Yes. Wait until it finishes installing the required roles and features. Click Close once done.