Alewood

It's a micro SD card. The u is for the lower case greek letter mu for micro

Thank you for the responses concerning win 8, it is a big help.

Has anyone had any issues using this gps with windows8? Such as mapsource, basecamp, or easygps recognizing the oregon 600. I'm curious, thanks.

1) The camera will come in useful for earthcaches where you are asked to prove your visit with a photo, or when you want to record details of the cache or cache location. 2) But the 650 also comes the rechargeable battery pack as standard (and although it can be added to a 600, Garmin UK aren't showing a price for it yet so doesn't seem available here yet) and also 3.5GB of memory rather than 1.5GB. I'm waiting for the 650 to arrive as IMHO the extras are worth the delayed delivery and higher cost. Chris Good points about the battery and memory, thank you for pointing that out.

I have a question regarding this gps unit. What is the advantage of having the built in camera and would it be worth the increase in price? I'm actually leaning toward the 600 and buying any additional maps I would need. Thanks for your help and I look forward to the replies.