HanShi (6/4/2014)
The file extention MPMP is not a default SQL extention, so probably it is generated by some other process. Can you see who created (is owner of) these files?Perhaps a longshot, but this could give some information for you to sort out: http://serverfault.com/questions/29816/what-is-the-sqldump-file-for
Another possible option (again a longshot): some kind of export process (like: http://sqldump.sourceforge.net/) is extracting the data from the database to flat files on disk?
I think what the OP is probably referring to is a SQL Server mini-dump file.
To the OP, as previously requested, what Recovery Model are you using? If it's Full then you should be taking regular transaction log backups.
Regards
Lempster