class User(models.Model):
    login = models.CharField(max_length=25)
    password = models.CharField(max_length=25)
    limitmb = models.FloatField()
    premium =  models.CharField(max_length=3)
    mail = models.CharField(max_length=30)

class Directory(models.Model):
    name = models.CharField(max_length=15)
    parrentdirectory = models.Foreignkey(Directory)

class File(models.Model):
iduser = models.Foreignkey(User)
name = models.CharField(max_length=25)
iddirectory = models.Foreignkey(Directory)