Hello Rachel, and thanks for writing.
All I can tell you without giving anything away is that the card is actually fine and what you’re experiencing is part of the puzzle.
The first batch of cards that went out were readable on a computer when they were delivered but all the cards that went out in later batches won’t work in your computer when you receive them so if you’re seeing differences between yours and other peoples, that’s why. Keep playing and it will make sense!
SparkFun Electronics, Inc.
6333 Dry Creek Parkway
Niwot, CO 80503
NEW TECH SUPPORT REQUEST!
Hello there! A customer has created a new technical support request.
CUSTOMER: [ https://sparkle.sparkfun.com/sparkle/customers/
ORDER #: 3578871
PART SKU: SPX-14379
NOTES: The SD card that came with my Prototype was unreadable. Is a
tarball or iso image available for download with the contents that
were supposed to be on it? I learned from IRC'ing some folks at my
local hackerspace, two of whom are also working on it, that one if
their SD cards was bad as well, really not a good rate. <penth> So my
Protype arrived with a microSD card that's not even recognized as
media by my laptop. :( <peejay[m]> Jfred had the same issue :/ Mine
worked & we copied the contents to his laptop 2 out of 3 *is* bad, in
this case Thanks, Rachel "Penth" Rawlings
-- Mr. Sparkle