@Override public void put(int index,byte[] value){
  System.arraycopy(value,0,datastore,((index) * sizeOfEachElement),sizeOfEachElement);
}

@ Override public void put ( int index , byte [ ] value ) { System . arraycopy ( value , 0 , datastore , ( ( index ) * sizeOfEachElement ) , sizeOfEachElement ) ; }
this method will be used to insert mdkey to store
