So have a 128 gb sd card and have been converting and installing everything i can get a hold of and still have 20+ GB left when i noticed big blue menu and coin setter were no longer on my 3ds. they were still installed but icon was not available so use gateway .3ds file to get back in to big blue and deleted big blue .cia and coin setter and reinstalled them the icons were available again but noticed angry birds games were now gone SO came to the conclusion that the nand ??? may have a menu limit of games 333ish counted number programs in big blue menu just thought i would let you guys have this info Update: So when i went to delete some of the recent games i installed that didnt work my missing games (icons) showed back up as a gift box again. so i think the 3ds hits the limit for example icons are labeled a to z when limit is reached the next game replaces a as a1 b1 c1 ext. and a b c are replaced if a game is removed the missing game comes back the fill the gap hope that makes sense