There are some ROMs in my flashcard that have savefile's extension in uppercase format (.SAV) instead of usually lower case (.sav). I noticed that most ROMs dump that have XPA at the start almost have extension like that. What's the matter of this? Why it should be different save extension case? note: For someone that have problem with change rom from cracked to cleaned rom like DQ9, your rom save file extension is uppercase... change it to lower case will fix it. Edit: After searching with keyword "uppercase", I found the cause of this case from tk_saturn at http://gbatemp.net/index.php?showtopic=240401&hl= I confirmed that this problem still occured in AKAIO 1.7.1 because XPA-* roms that I mentioned have 8 characters lenght like tk_saturn addressed. Also other roms in my memory card that filename have below 8 characters always have uppercase save file extension. I tested to recreate save file in AKAIO 1.7.1 but it will always generate the uppercase save file extension for below 8 characters files. This problem will lead users to have problem when rename save filename from below 8 characters file to more than 8 characters file but not change save file extension to lowercase.