>>405474OK, first: YOU CANNOT simply install Linux over another OS without losing what was on there, it uses a completely different file system so a format is done before install. Files either have to be stored somewhere temporarely or kept where they are and then pulled over when the system was installed. Linux can also work with NTFS just fine so you could also just keep them where they are and use the NTFS Windows partition just as storage partition.
When your Windows is the only system on there it surely fills up the wile drive, so to install another OS you will have to free up some unused disk space by reducing the Windows partition's size, that is called shrinking, iirc Windows does not do shrinking of the partition it is currently on, so you will have to do that from outside. The live- system of your linux seems perfect for that, just boot it from its stick and use GParted, that disk manager is really powerful, taking care by itself that no data is lost by rearranging data that would be out of bounds after shrinking. Once you have enough free unused space you can install the Linux in there so that in size it is smaller than the Win- partition but it is still the main system. That's how I did it too, my Linux system is 50GB big, my Windows partition is 950GB big, but the Linux is still the master.
When it is installed the Windows partition will be auto detected and mounted, you can now use it just like you would in Windows, you can pull over files, copy them over there, start videos from there etc. So the question is if moving over to Linux is actually really needed...