- Login and go to your dashboard.
- Click on Media.
- Click on the 'Add New' button.
- Select the number of files, and then drag the files to the WordPress Media. This will upload all files you have dragged.
- Or, you can click on the 'Select Files' button, and then navigate to where the collection of files exist. Select all files, and hit 'OK' or Open.
- Click on Pages, and recreate the steps from: How to Upload a File to a Page.