Thanks for the words! Definitelly this took a bit longer, I had to leave it for the weekend and the small issues and waiting times did not allow to feel I was working continuously on it. It is fun how it looks now that the problems were so small, once you know the answer everything is easy.
By the way, I have updated the original post for Report #1 to add a note on the HDD size and the need to install numpy.
Regarding the disk usage, I can confirm you that most of that space is the current basic installation of Xubuntu+basic packets (but python, fortran, C, make and so on are not so heavy), maybe close to 7GB. The MG5_aMC folder is only about 1.4GB and this weeks output below 1GB.
I started univeristy in the mid 2000s, there everyone thought Fortran was already too old school, just an excentricity. Later on, I had to pass mostly to Octave and Matlab and... a lot of easy solutions on Excel + VisualBasic (yes, I became that high level kind of people). Only this year is the moment I am modernizing myself and starting to use little python scripts. And python, that now looks omnipresent... was never in almost any conversation for us.
Btw, I need to find some time to try to write some of my normal posts, I want to update some of the topics I was covering the last months. But I also hope that the next episode of this project comes soon! I guess last week with so many days off... will not leave me so much time to write.
I would love to read again some of your normal posts too. There is however only 24 hours in a day and 7 days in a week, and there is not much we can do about it. However, don't worry, the next episode of the citizen science projet will be a bit lighter than the previous one, so that I won't take too much of your time ;) The reason is that we need to deal with the installation of another program (which may be super quick for some, but rather slow for others, depending on the system and how linux is mastered).
PS: I am definitely from the same generation as you, and I have experienced the same situation relative to programming. I was studying at the university during the end of the 1990s and the first half of the 2000s. Now, I am mostly dealing with codes in Python and C++. However, Fortran is still there a lot, in particular in the core of MG5aMC :)