[Apreche]

That depends.

Some files are files that are part of the web site. They are put there by the developer(s) of the web site. Things like maybe the logo image in the header, or that cool rotating flaming skull in the footer. These files just go on the file system of the web server.

Some files are user uploads. A person writing a blog post wants to upload some images to be inserted into that blog post. For these sorts of files I just use whatever object storage system makes the most sense given the circumstances S3, GCS, etc.