Normally, without a plugin, you would need to replace a media using
There is a simpler way of doing it.
Install a plugin to replace images on your wordpress installation. There is a very handy plugin named “Enable Media Replace.”
First of all, go to plugins and type “enable media replace” in the plugin search field, then activate it.

Click on “media”, choose the image that you want to replace. Click on it. scroll down the settings on the right of the picture, you will see a button named “upload a new file”. This is a button that was added by the “enable