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The Media Upload module provides the ability to control upload limits and to upload multiple files and convert them into media types all at once.

Click on an image to make it bigger.
D8 - Configuration - Media - Media Upload - Navigation

1. Navigate to Media Upload Settings

Go to Admin Menu > Configuration > Media > Media Upload.

D8 - Configuration - Media - Media Upload - Configuration

2. Select Media Types and Configure Settings

Accepted Media Types checkboxes = select Image and File.

Please note that due to resource constraints, the OSU Drupal 8 distribution uses third-party sources for Video and Audio media versus allowing the local uploading of these types of files.

Max Total Size text field = change to 0 - this will provide unlimited max total size.

Max Single File Size text field = leave set at 50MB.

After selecting the Image and File media types, each one will produce a set of configurations.

The default values work fine for our purposes.

Click the Save Configuration button.

D8 - Configuration - Media - Media Upload - Completed Configuration

3. Completed Media Upload Configuration

You'll receive a message at the top of the page upon a successful configuration update.

Note that there will also be a message at the top of the screen informing you that you don't have the Video or Audio type media. Ignore this message.