Images and files own website storage

I m Newbie,
I have websites, and would like to store images and files on my websites.

I don’t want to use any amazon or google drive

I used google drive, and one day they told me is 50$/ month
maybe next day they theywill ask 100$
It took me some weeks to move 40 websites with databases from one provider to another,
so question :
1/ how to develop with files on his website
2/ are they alias also?
jean luc