I've just got myself a nintendo DS lite with R4 (originally owned by my older cousin) I admit that i only have very "little" Knowledge when it comes to this one. I dont even know if i have the "clone" one or the original one. Its black and its says " R4 Revolution for DS (NDSL/NDS)" When i received my Ds Lite coming with an R4, Its working just fine. (It says v.1.18) Until recently when i decided to look up on the internet about updating it, some problems occured, Like corruption of sav games,Unable to load save games,Unable to save, Freezing..etc. I updated my R4 to R4wood 1.38 by that time, and transfered my PKMN Diamond there and the save file (already changed the file extension .nds.sav) I was very surprised when i loaded Pkmn Diamond, it says something about the corruption of the sav file, which i ignored and played on for a few hours and saved. when i loaded the game, the game is still saying about the corruption thingy, and will load the previous sav data. Its very dissapointing to see your hardwork became a trash.. On the next day at school, I approached a friend of mine who had an r4 Exactly as mine(running r4WOOD 1.31),I asked about the corruption of sav datas, knowing that he doesnt have any clue about it. I asked his permission to borrow his sd card to try it on my R4. Unfortunately, when i loaded the game ( kingdomhearts recoded) the sav game was deleted. (Pokemon Black not working here, freezes at the intro,;Yugioh World Championship 2011 over the nexus also not working, Unable to "write the data" something;Pkmn Heart Gold, "Imposible to save" something) I copied all of the files (including his roms)on my friend's r4 onto my r4 (after seeing pokemon black working on him) (we are now running on the same firmware) i tried Pokemon Black afterwards. I was very happy when it worked, well it worked only up to the intro and it froze.. Iam using r4wood 1.xx (i dont have my ds now and i cant remember) but my Pkmn Diamon is working with the sav file everything else are still the same. Whats the problem? is it my SD card? or my R4? Faulty perhaps? or am i using a wrong firmware-kernel or anything related? or is it my DS? Thanks for your time reading this! any help is greatly appreciated!