New iMac/New Asus Router

Hi all,

I have my new Imac and just purchased a new Asus RT-AC66R router. Everything works perfectly with my new mac except for my Seagate USB HD connected on the router. I have it formatted as MAC OS Extended, I bet the router can't see that format and I should format into Exfat???? Not sure....Any thoughts????

Thank you

Yes, plugging the external HD works with the new iMac, but I would like to be able to access files on the external HD via the router. I think think that is the only way.