Logging with V5 Vexcode Pro

The simplest way would be to write that data onto a file written on an SD card on the V5 Brain.

You may find these helpful:
https://api.vexcode.cloud/v5/html/classvex_1_1brain_1_1sdcard.html

Edit:

You can also use the standard C++ std::ofstream to write to a file onto the V5 SD Card, Which is probably an easier method in my honest opinion.

https://www.learncpp.com/cpp-tutorial/basic-file-io/
https://www.cplusplus.com/reference/fstream/ofstream/