Quote:
Originally Posted by The_Laird
Photo posted to show hardware and software versions.
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You have the last official software release (650) for the first generation of RNS-E unit.
So you're limited to a maximum of 2 x 4GB SD cards (that unit does
not support SDHC cards, even 4GB ones) as linked to by briang9 earlier.
2GB (or smaller) SD cards are cheaper and easier to come by, but of course you can't get as many tracks on them.
You have the latest maps: 2019 (DD) release.