Garmin saud I needed an SD card of 4 GB capacity to handle more map updates, and I want to buy the correct item. The Satnev is a Garmin nuvi265WT.SDSC (Standard-Capacity) cards, typically called SD, have an official maximum capacity of 2 GB, though commercially available up to 4 GB.
SDHC (High-Capacity) cards have a maximum capacity of 32 GB.
They just said to get a 4GB SD card. No bigger as the device would not read it.Just get yourself an SD or SDHC, I would go with the SDHC and get a Class 4 one too. Class 4 is rated at 4 MB/s
Does the Garmin specify any particular brand or Class?