Warning: Spoilers inside! I guess this is a good place to put this since pokesav is stickied here. I was hoping to find a solution already, but it sounds like people don't play yugioh. >.< So Yugioh 2011 has a whooping 190 blocks for you to save replays, your own duel puzzles, and of course dlc(including forbidden lists, ghost data,...and stuff). So I saved a few replays, and I'm out of space. wut? delete "unnecessary data"?! '>.> So no. There has to be a way to extract the data from those 190 blocks to some file, and somehow inject it back in. So I opened the save file with a hex editor. The picture above is a snapshot I took. It caught the most interesting part anyway. I assume this is the 190 blocks(not just the snapshot). The file starts off with some nonsense(just a few lines) and then some 00s. And then the snapshot. The snapshot explains what I think everything is, because it almost looks obvious. After that replay, it was more 00s, and then the next replay. And it went on like that for all the rest of the replays. Replays is all I had, so I didn't see what anything else looks like. But then after the last replay, there were some more 00s and then [512KB-190ish blocks] worth of nonsense, which is most likely game save data. Everything from your name to your decks to your appearance/where you at/what you've done/how many times..etc. So I don't think any of that needs to get looked at. Just the beginning. So the intention was to make a import/exporter(should be some simple code), but I have no idea how to handle hex. >.< I should try shifting some data in the hex editor first. Guess I'll do that later and report what happened. I'm just scared of those 00s. idk if I should keep the first set of 00s or the second set or both. Feedback is appreciated.