I've been having this problem since yesterday... Sometimes when i try to load a ROM, when i start it, it goes to the Nintendo 3DS screen then blacks out and gives me a "Game Card Removed" error, where i have to hit Home to send me back to sysnand. Other times, games work... but ill eventually end up getting the error again during play, and this loses your savefile (Had to redo Theathrythm FF Curtain Calls prologue and tutorials 6 times today). I have been seeing others are having this problem, i dont think my MicroSD is fake. Its a Sandisk Ultra exFAT 64GB Class 10. This as of right now is my 4th time reformatting it... Trying anything to get these games to work stable. Does anyone have any advice to stop this? edit: Also, ive tried using "xcopy", and command prompt lines to transfer files to my SD non fragmented, i even defragmented my whole SD card a couple times. No dice with anything. Gateway Red Card passes all Diagnostics. Nintendo 2DS 8.1U Sys/9.4 Emu edit 2: Progress! I formatted my 64GB MicroSD to exFat with a "32kb" Default Allocation Size. I saw someone else post on these forums to try that and that fixed their problems, and so far its done the same for me! I cycled through 27 games, of which 0 gave me a hanging black screen, and 0 game card removed errors so far. I'd strongly suggest anyone to try this, if they're running into the same problems! Also, i updated my Gateway Red Card by holding R at the GW menu with 3.0.1 (dont know if that makes a difference). Happy gaming everyone! Will report back if i run into any more problems. edit 3: I'd like to request a close to this topic if possible, we're adequately discussing this in greater detail in the other "Gateway 3.0 and 2DS: Broken and Unusable" thread. 32kb Allocation Size worked for a bit, then it went back to being shaky.