Hi "markfilipak", and anyone else interested in this,
I have been following your post and the good replies to it. Here are my thoughts on this as well.
This is such an easy task to create a USB flash drive stick, or DVD, of Linux Mint using a desktop graphical application. You seem to be over-thinking this, or making this process much more complicated than it is.
The only thing that can be somewhat complicated is verifying the Linux Mint ".iso" file(s) checksum value, and or security signature of the file(s), before creating (burning) a USB flash drive stick or a DVD, and you do not need to do that now, even though it is recommended.
My post on how to verify a Linux Mint .iso file(s)
Once you have downloaded a Linux Mint ".iso" disc image file somewhere on your system, like your "Downloads" folder, to create a Live "Test Drive" demo installation version of Linux Mint, you can use various simple to use desktop applications to create a USB flash drive stick, or DVD of Linux Mint. As far as I know, there are no problems with their live demo installation ".iso" files.
If you are using MS Windows, or Mac, or Linux then you can install & run the simple and easy to use "Unetbootin" USB flash drive stick application using the link below.
- just click the link below, then click whatever operating system you are currently using to download and install this simple and easy to use application. If you are using MS Windows, then click the MS Windows button to download the ".exe" file and run it to install it. If you are using Mac, then click the Mac button, download the ".dmg" file and run it to install it. If you have a version of Linux already installed, click the Linux button, and install it using the PPA instructions, or other instructions; FYI: For existing Linux Mint users, the Linux Mint Image Writer (MintStick) application works very well too.
Once you have "Unetbootin" installed, put a formatted USB flash drive stick (recommend using "Fat32" format) into one of your USB ports, then run the "unetbootin" program, when the screen comes up, enter in your password (if asked), click to select disk image ".iso" near the bottom, then click the button to the far right of that with 3 dots and browse to wherever it is you downloaded the "Linux Mint" .iso disc image file, click the file, then select the USB flash drive stick just below, if it is not already shown, and click ok. During this process when it is writing (creating) the bootable USB flash drive stick, it may appear to be stalled when processing the somewhat large 1.5 gigabyte Linux Mint file, it is working, just wait a little bit and it will continue.
Click link below to view a sample Video of using "unetbootin". My Linux Mint .iso files in this video are on another attached drive, yours will probably be in your local "/Home" and or "/Downloads" folder.
Linux Mint Image Writer (MintStick)
- the USB flash drive stick does not need to be pre-formatted with this program.
Click the link below to view a Video showing how easy it is to use the Linux Mint "Image Writer" (MintStick) program to create a bootable USB flash drive stick of any edition and version of Linux Mint from one of their downloaded .iso disc image files.
Start the Image Writer program, on the upper left where is shows "write image", click the button just to the right of that for "Select Image", browse to wherever you downloaded the Linux Mint .iso disc image file, click that file, then on the upper right, click that button (box), to select your USB flash drive stick, click that, then click the "write" button at the lower right, and wait until it is done.
Hope this helps ...