Hello again, @Tosin_Adesola 
First, let me start by making a small correction: the command that I asked you to run was very similar to what you ended up running, but with a small but important difference. So, I asked you to run the following command:
ls -ld /etc/X11/*/
The "-l" in the command above is "minus lowercase L"). The "-l" in the "ls" command stands for "long listing", which includes the date of the files and directories. However, the command that you ended up running was the following:
ls -id /etc/X11/*/
So, you used "-i" ("minus lowercase I"). The "-i" in the "ls" command stands for "inode", which prints the "index number for each file" (that's why you got those long numbers in the beginning of each line, instead of the other information that the "-l" of long listing gives, such as the permissions, the dates, the owner and the group).
OK. If you now run the following command:
ls -l /etc/X11/xorg.conf.d/
... I'm guessing that you'll get the following output:
total 0
If you get that "total 0" result, that means that folder is empty and what probably happened is that you saved the "20-intel.conf" text file somewhere else (I'm guessing that you probably ended up creating that file somewhere in the "home" directory of your user).
Anyway, the most important thing is to create the file in the correct place. So, I suggest that you follow the following instructions, that are similar to the ones I gave you before, but now, in the step 2 of the command to run "pluma" as administrator, we'll specify the full path to the text file (including the file name) in the command itself and in step 4 we'll use "File" -> "Save" instead of "File" -> "Save As":
1 - Open a command prompt
2 - Run the "Pluma" text editor as an administrator (superuser) to create and edit the "/etc/X11/xorg.conf.d/20-intel.conf" file, by running the following command in that command prompt:
sudo pluma /etc/X11/xorg.conf.d/20-intel.conf
3 - Paste the following lines into "Pluma":
Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "TearFree" "true"
EndSection
4 - Still in Pluma, use the "File" -> "Save" menu option to save that text file.
5 - Exit "Pluma".
6 - Reboot the computer.
I hope this helps
