C++ Transfer Files From Qt to External USB Drive

Question

I am new in Qt and I need help in transferring all files from a specific path of the local machine to an external USB Drive.

Answer 1

I have solved the problem with the QStorageInfo::mountedVolumes() which return the list of the devices that are connected to the Machine. But all of them won't have a name except the Pendrive or HDD. So (!(storage.name()).isEmpty())) it will return the path to only those devices.

QString location;
QString path1= "/Report/1.txt";
QString locationoffolder="/Report";

foreach (const QStorageInfo &storage, QStorageInfo::mountedVolumes()) {
    if (storage.isValid() && storage.isReady() && (!(storage.name()).isEmpty())) {
        if (!storage.isReadOnly()) {

           qDebug() << "path:" << storage.rootPath();
           //WILL CREATE A FILE IN A BUILD FOLDER
           location = storage.rootPath();
           QString srcPath = "writable.txt";
           //PATH OF THE FOLDER IN PENDRIVE
           QString destPath = location+path1;
           QString folderdir = location+locationoffolder;
           //IF FOLDER IS NOT IN PENDRIVE THEN IT WILL CREATE A FOLDER NAME REPORT
           QDir dir(folderdir);
           if(!dir.exists()){
              dir.mkpath(".");
           }

           qDebug() << "Usbpath:" <<destPath;
           if (QFile::exists(destPath)) QFile::remove(destPath);
           QFile::copy(srcPath,destPath);
           qDebug("copied");

        }
    }
}

I had to create a folder as well as in USB because of my requirements and I have given a static name for the files. Then I just copied the data from file of the local machine to the file which I have created in USB with the help of QFile::copy(srcPath, dstPath). I hope it will help someone.