Thread: nüvi 3x0 SD & Map Size Limits

Originally Posted by quebec001

City North America NT 2014.40 full = ~2.11gig and without Mexico =~1.84gig fit on SD 2gig

Beware! Theoretically *), a 2 GB SD card with have space for 1.86 GB worth of data. In practise, a 2 GB SD card will only have around 1.83 GB of space available for data. See screen shot below:

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*) 1 GiB = 2^30 = 1,073,741,824 bytes, whereas 1 GB = 10^9 = 1,000,000,000 bytes
Therefore a 2 GB SD card provides 2*(10^9/2^20) = 1.86 GB of storage space (and in practise, as mentioned, often even less).
As a result, the 1.84 GB USA & CA map may not fit on a 2 GB SD card.
For more detailed explanation, see here:

Code:

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