Method beginFile

3ds/source/transfer.cpp:241–247

            return true;
        }
        bool beginFile(const std::string& relPath, uint32_t sizeHint) override
        {
            ensureDirectoryPath(destRoot, relPath);
            std::u16string outPath = destRoot + StringUtils::UTF8toUTF16(relPath.c_str());
            output.emplace(Archive::sdmc(), outPath, FS_OPEN_WRITE, sizeHint);
            return output->good();
        }
        bool writeFile(const void* data, size_t n) override
        {
            output->write(data, (u32)n);