For examples in STM32Cube_FW_H7_V1.8.0\Projects\STM32H735G-DK\Examples and STM32Cube_FW_H7_V1.8.0\Projects\STM32H735G-DK\Applications
One would typically clone a project (easy in Keil or IAR), or pull the whole/complete files into a new project.
Where there is a single file that needs to be combined, look to use merge tools like WinMerge, etc.
When creating new projects you'll need to point to include paths within the BSP directories, and add the source files into the project
STM32Cube_FW_H7_V1.8.0\Drivers\BSP\STM32H735G-DK
STM32Cube_FW_H7_V1.8.0\Drivers\BSP\Components\Common
Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..