why i cannot generation code when i want to establish a project？？

[GYang.2]

[Tesla DeLorean]

Because apparently your internet connection can't sustain the download of the CubeF7 package?

You can download CubeF7 directly, and install "From Local" within CubeMX

https://www.st.com/en/embedded-software/stm32cubef7.html

Make sure you have the repository directory set up, and that it is accessible. Check for interference from AV software.

[GYang.2]

I have downloaded the F7 package？There are so many files，how can I import what i need to my own project？