the G.P.S. says that the new card isn't acceptable. Is there any way to "debug" it?
I also would like to learn this.. please post here if you find answers.
Can a SD card be "broken"?
in a word, YES.
I seen many SD cards that became "broken".
Most of the time the card simply loose its indexing system, usually happens when the card is removed from a reader/writer before it finish the operation, thus the files are no longer accessible.
Next "broken" type is by Static electricity.. almost any micro electronics are prone to this.
and last I seen so far is physical damages to the card or its contacts.
There is also problem when the little tab on the side were broken or gone missing - the card is then "locked" and supposedly cannot be written into anymore..