Invest a few more euros to be quiet

Transcend 4GB SDHC Ma was poorly recognized by this player (and Linux, and Windows): read only, despite the rider properly placed.
The AFN is able to read and write on the card, but with this player, it appeared as read-only.

The result: I took a Sandisk SDHC 4GB Sandisk III - High capacity SD (SDHC) Extreme III - 4 GB and Micromate player with his Micromate player: it works nickel, and my Transcend is properly recognized by the reader ( writing and reading). As for the NAMU key, it will eventually forgotten.