Deep breath... too much going on here...
NOOBS is an Installer. It does not have a username or password.
The files that make up the NOOBs Installer have to be copied onto an SD card that contains only a single FAT-formatted partition that occupies the entire card. exFAT is NOT an acceptable substitute. [It isn't clear to me what the specific point is at which utilities choose to use exFAT as their default format - it is somewhere 'between' 32G and 64G.]
The link you have posted relates to creating additional spare file storage capacity on a system that is already up and running - it is not applicable to your situation.
If you want to change your target from NOOBS to a directly-installed version of Raspbian then be aware that you cannot simply 'paste' the image onto an SD card. It has to be 'burnt' or 'flashed' using a dedicated utility such as Win32DiskImager.
Short documentation for NOOBS is here:
https://www.raspberrypi.org/documentati ... n/noobs.md
Full documentation for NOOBS is here:
https://github.com/raspberrypi/noobs/bl ... /README.md
Documentation for installing Raspbian is here:
https://www.raspberrypi.org/documentati ... /README.md
And finally: the username and password for Raspbian - whether installed directly or via NOOBS - are documented towards the end of this webpage:
https://www.raspberrypi.org/help/noobs-setup/ (they are not the ones you have tried)
PS: Having seen your other post on this topic. It is now clear that NOOBS is blocking progress because the card has not been pre-formatted correctly. This should not be an issue for 'flashing' Raspbian directly. If both methods of installation fail I would begin to suspect that you have an SD card whose actual capacity is not as marked on the packaging.