Hacking New Super Mario Bros. Extra File?

[gameboyninja]

When I load up my DSTT there are two new super mario bros files. One is the actual rom, but the other one is something else. I can't seem to get rid of it through the computer, as it's not there. The second file is 4k in memory. Help?

 

[Depravo]

Sounds like your card got corrupted. This is quite normal.

Back up any files you can, reformat your SD card and replace the files.

 

[gameboyninja]

Really? Wouldn't it mess up all the games?
Man, I can't believe that in one week this would happen

 

[gameboyninja]

Hmmm. Now it's happening with the app ds reader...
By the way, the files are in the main menu.

 

[Kevin242]

does the extra file have a "_" in front of the filename by any chance? Are you by any chance using a Mac to load the files on your card?