'User's Manual' for the MobileMapper 10 recommends that
you use SANDISK Micro SD cards.
After some user
complaints, last week I purchased a few (nearly 75)
and it is my personal
opinion that the 'Transcend' brand is a MUCH BETTER
CHOICE. Here are the SD Card Facts as I know them:
Most 2-GB SanDisk
Some 4-GB SanDisk cards
work, some don't. I can't visually tell the differnce.
No (none) 8-GB SanDisk cards
Transcend 4 GB and 8 GB card that I tested worked with
For background, there
is a little 'C' on the cards:
Inside the 'C' is a number: 2, 4, 6 or 10. (In the image
above, there is a 6). The number is the 'Class' and
higher is faster. '6' indicates that the card will write
6 million bytes per second to a card in a fragmented
The HC stands for 'High Capacity'. The original cards
were 'Standard Capacity' (SC). There are also SDXC (eXtended
There are reportedly over 400 brands of
SD Cards and over 8,000 card models. I only tested
SanDisk and Transcend.