There is a plenty diversity in information units through the code, command-line options, GUI and logs. Here are some examples:

`-dbcache`
**megabytes** in CL and GUI _vs_ **MiB** in logs and code (constants in [txdb.h](https://github.com/bitcoin/bitcoin/blob/master/src/txdb.h))

`-prune`
**MiB** in CL _vs_ **GB** in GUI. Also, setting prune = 1 GB in GUI gives _incorrect_ prune target = 1000 MiB.

Which prefix type -- binary (a power of 2) or SI (a power of 10) -- is preferable in the Bitcoin Core project?
{
    QString dir = QDir::toNativeSeparators(QFileDialog::getExistingDirectory(0, "Choose data directory", ui->dataDirectory->text()));
    if(!dir.isEmpty())
        ui->dataDirectory->setText(dir);
}
void Intro::on_dataDirDefault_clicked()
{
    setDataDirectory(getDefaultDataDirectory());
}
void Intro::on_dataDirCustom_clicked()
{
    ui->dataDirectory->setEnabled(true);
    ui->ellipsisButton->setEnabled(true);
}
void Intro::startThread()
{
    thread = new QThread(this);
    FreespaceChecker *executor = new FreespaceChecker(this);
    executor->moveToThread(thread);
    connect(executor, &FreespaceChecker::reply, this, &Intro::setStatus);
    connect(this, &Intro::requestCheck, executor, &FreespaceChecker::check);
    
    connect(this, &Intro::stopThread, executor, &QObject::deleteLater);
    connect(this, &Intro::stopThread, thread, &QThread::quit);
    thread->start();
}
void Intro::checkPath(const QString &dataDir)