I am using Garmin GPS 1490T for the older model and there are no problems with it in the unit. The only issue I had was the standard size SD adapter that came with it. I had to squeeze it tightly for the computer to recognize it properly. At first I thought that the microsd is defective, since my computer did not see it even with a full-size adapter and after flashing it several times recognized something, but this is not good. Luckily the problem is only with the adapter, the microsd card works fine in the GPS every time. I have an 8GB+ European card with no problems.
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