C++ Read Access violation error

I am currently getting an "0xC0000005: Access violation reading location 0xcccccce0." error and I have tried diagnose the problem...I think the problem comes in when my rule of 3 that I have defined comes in play and points me to here.

size_type size() const
     {   // return length of sequence
     return (this->_Mysize); <---------------------this line
     }
 

I'm actually not sure if there is any problem at all, I have been dwelling on this for days on end.

here is my rule of three

ArrayStorage::ArrayStorage(){
      myArray = new string[7079];
 }
 
 ArrayStorage::~ArrayStorage(){
     delete[] _data;
     delete[] myArray;
 }
 
 ArrayStorage::ArrayStorage(const ArrayStorage &A) {
     _size = A.size();
     _data = new string [size()];
     for (int i = 0; i < size(); ++i)
         _data[i] = A[i];
 }
 
 ArrayStorage& ArrayStorage::operator=(const ArrayStorage &A){
     if (this != &A) {
         delete [] _data;
         _size = A.size();
         _data = new string [A.size()];
         for (int i = 0; i < size(); ++i) {
              _data[i] = A[i];
         }
     }
     return *this;
 }
 
 const string& ArrayStorage::operator[](int i) const{
     assert((i >= 0) && (i < size()));
     return _data[i];
 }
 
 string& ArrayStorage::operator[](int i){
     assert((i >= 0) && (i < size()));
     return _data[i];
 }
 

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