An outline of the settings under Media in your WordPress website.
|Image size||Here you can tell WordPress how to crop images if your theme does not already have image resizing embedded within itChoose a:
Some themes will already have image sizes coded into them and the theme will then override these settings.
|Uploading Files||WordPress stores images, videos, audios, PDF’s, etc. into a folder called uploads within your websites files.You can check the box to have WordPress organize your uploads into month- and year- based folders – this is on by default and I recommend leaving it that way|