700i SD Card issue

Just purchased a Montana 700i. Then purchased 24k topo southwest (side note - I purchased the same map  a couple of years ago but only allowed on one device - really?).

Updated 700i thru Garmin Express, it recognized the card, but every time I try to install the 24k topo map I just bought, it says:

I have a Windows PC (newer), using Garmin USB cable.

This is the card I bought:

Garmin support agent said "it might be too fast" --- What? What year is this?

Anyone else run into this and possibly solve?