I dont think many people are reading through the thread. And are posting the same thing over and over again.

1. this is bulk packaging, ie you save money.

2. Get a card reader that supports sd hc. "secure digital / high capacity". If it does not support hc then your card reader will not work.

3. The serial number on the micro sd card is a batch number, not an individule one.

4. Nextweb, and others have already contacted sandisk and confirmed that these are legit cards.

5. Different series of cards have different logo's on the front.

6. I forget what six is for.