Is there any other methods that i could just do by using my laptop?Maybe your emuNAND partition became the primary partition. You could backup the contents, then use emuNAND9 to format without emuNAND, then format with emuNAND, then flash your backup back to it and it should be fixed (if that was the issue).
BTW it is unlikely to be a fake SD card because fakes are designed so that your computer thinks it's got lots of space. Your computer doesn't think this.