I recently bought a 4GB and 8GB Sandisk SDHC microSD card with a mini-SD card adapter. However, when I use them on the N810 with the mini-sd card adapter, they don't show up. I double checked and it inserted with a click into the slot. Both of the 4GB/8GB sandisk SDHC microSD work on my desktop. I then switched the micro-sd card with a 2GB kingston SD card, and it works on my N810. Anybody encountered this problem on their N810? Does the N810 support Sandisk brand SDHC card? Or I should go buy the Kingston brand of 4gb/8gb?