Hello, first of all I'm not sure this is the right place to post it, I hope it is.
So, I've been playing SS for more than a year now, just yesterday I played a bit, got Treecko through Wi-Fi Center, battled some trainers in Johto, and saved my file. It was all ok. Now today I just woke up, turned on the game and after the intro appeared a message which said:
The save file will be erased due to coruption or damage.
And from there it goes to beggining a new game. What happened? I don't know what to do, I just don't want to lose all my progress