QT write another Thread data in txt file

  c++, qt, qt5

I want to write data from another thread in txt file.
Text files will be named currentTime() and created periodically every minute.
So, Txt file made very well every minute using QTimer, but In Txt file, content is null.
Of course this result is correct. Because i didn’t connect data from another Thread.
How to connect or send data from another thread to QTimer make the txt file every minute?
For example, another thread get data every second and QTimer make txt file every minute.
Ideally, another thread get 60 data in minute and one text file made in minute.
I want to write 60 data to txt file one cycle.

Source: Windows Questions C++