I bought two of these for use with two Garmin nuvi 1450  units. In my opinion, it is unfortunate that the Garmin nuvi 1450 requires extra storage capacity to handle updates; I think they should have had at least enough storage capacity built into the original units to handle the United States and Canada. I don't know yet whether I am going to need a bigger card soon to handle the updates and I don't know whether a bigger card is available.