Из переменной типа std::string записать в файл большое количество данных (2 Mb)

#include <iostream>
#include <fstream>
#include <iterator>
#include <algorithm>
 
int main()
{
    std::string outString = "qwerasd asd asf sa ffsd f\n"
            "ssadf sdf sadf sa fsdf sdf sddf \n"
            "s fsadf sad fsad fsd fasdf sdf \n";
    std::ofstream outFile("file");
 
    std::copy(std::begin(outString), std::end(outString),
            std::ostreambuf_iterator<char>(outFile));
    return 0;
}

std::copy(outString.begin(), outString.end(),
            std::ostreambuf_iterator<char>(outFile));

#include <iostream>
#include <fstream>
#include <iterator>
#include <algorithm>
 
int main()
{
    std::string outString = "qwerasd asd asf sa ffsd f\n"
            "ssadf sdf sadf sa fsdf sdf sddf \n"
            "s fsadf sad fsad fsd fasdf sdf \n";
    std::ofstream outFile("file");
 
    std::copy(outString.begin(),outString.end(),
            std::ostream_iterator<char>(outFile));
    return 0;
}

ifstream f(pathToFile);
 
    string data1;
    while(!f.eof())
        getline(f , data1);
 
    f.close();
    ofstream review1(pathToFile, ofstream::trunc);
    Form1->ADOQuery1->First();
    for(int i = 0; i<strNumber; i++)
    {
        Form1->ADOQuery1->Next();
    }
 
    data1.erase(virPlace, virLenght);
 
    copy(data1.begin(), data1.end(), ostreambuf_iterator<char>(review1));
    review1.close();

copy(data1.begin(), data1.end(), ostream_iterator<char>(review1));

    std::ifstream inFile("file");
    std::istreambuf_iterator<char> inFileBegin(inFile);
    std::istreambuf_iterator<char> inFileEnd;
    std::string outString(inFileBegin, inFileEnd);