I see a lot of posts flaming Acekard but not many from owners trying to resolve their problems(other than sending it back.) Maybe there's a temporary fix until Acekard can permanently resolve the issues. Post your experiences in a sincere manor here. I recently received two Ultra Guide labeled versions from DX and they're working one day so far. The only thing I don't like is the long load times. This is my first SD card solution so I don't know if SD card solutions take longer to load than cartridge based solutions. I just know the Acekard 2 is taking longer to load game backups than my G6 Lite. However, I've yet to come across a NDS backup that hasn't worked with the Acekard 2 including ones that flat out fail with my G6 Lite at its default management settings. I like the included USB SDHC adapter; so far it's working great with my USB1.1 compliant system and Transcend 4GB SDHC microSD cards. After preparing the first microSD card it took 1 hour to create a WinXP backup file. I then restored the backup to a second microSD card that also took an hour. As far as AK2-in-use, I've loaded game backups and deleted some game backups from the microSD cards. So far the only time I received the Fat Error message was when I intentially placed one of the AK2 in the slot-1 w/out a microSD card inside. From this, I think the message could be a general multipurpose error message used whenever there's an issue between the AK2 and the microSD card whether it's connection related or corruption on the SD card. If you've received the Fat Error message, was it related to one SD card and if so, did you reformat the card or even do a low-level format?