Transfer files from PC to Android doesn't work

Hello

Smartphone (Sony Xperia XCompact, Android 8.0.0) and PC (Windows7) connected correctly with TeamViewer. Last versions TeamViewer windows software and android app installed on the devices.

With the smartphone device, I can transfer files from smartphone to pc but the transfer from pc to smartphone doesn't work.

I select the pc file and then I tap on it where I would like to paste it. On the smartphone, the file transfer window with the progress bar, compares for a fraction of a second, also for big files (you can just see it for a very little bit) so it doesn't work, and so no transfer from pc to the selected smartphone file folder. While, I repeat, the thing works in the opposite direction (from pc to smartphone)