The other issue is that specific files, like sound files or graphics files, need specific software to access them. This creates a high learning curve. But, the effort is worth it. About the files You are likely to find files of three general kinds. One of the most common is update software supplied by the company you bought the software from.
People also write software that they generally distribute in two forms.
Shareware and Freeware. Shareware is software that you are free to use and sample. If you find the program useful, then you are told how and where to pay for it. Freeware is just what is says. Sometimes you can find them by reading about them and doing a web search for them.