You might have an option set for your operating system to hide files of these kinds. And I suppose they might be hidden altogether. That's an operating system option you have to hide known file extensions. It's worth mentioning at this point that it's possible you won't see the file extensions on these files.
If in doubt, you can always select these two files and delete them. These are the actual database files that Media Composer is using to manage and navigate the media that you are working with. And you'll find in each one of these numbered folders in the Avid Media Files folder, you're going to have a.
And here, I'm in the Avid Media Files folder for one of my media drives, inside that MXF folder and inside one of the numbered folders. And if not, you've got Load Media Database. Well, there's a short version of course of everything I'm telling you here, which is that in any case, if you find that your media is not available in the way that you expect it to be while you're editing, you can just go into this File menu, go into Media, and choose first of all Refresh Media Directories, that'll usually fix it. And again, you'll find that some pieces of media just missing, they're just not available.
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This means if you're making changes to the contents of your projects, while parts of a project are closed, which is something we'll look at how to do later on the part of the media database that you need when you later open other parts of the project, might not actually be in the system memory. In order to maximize the system resources available for video editing, Media Composer only loads the parts of the media database that it thinks you need. That database isn't fully loaded all of the time. Actually, I mentioned a database that Media Composer uses. And then we've got this option Load Media Database, which is very technical sounding term. Very often just choosing this option will cause media to become available in projects that was otherwise missing. And so if you click this option, Refresh Media Directories, Avid will perform a kind of tally, to check that the database that it has on file matches the media that you have on your system. If you have moved your media around, then it's possible that Media Composer doesn't know which file or which folder, or which drive relates to which. But first, I want to show you the Refresh Media Directories and Load Media Database options. We'll get on to the media creation settings later. But before we do, I want to show you under the File menu, under the Media sub menu, we've got a couple of interesting options. So here I am inside of Avid Media Composer and we'll be getting into this properly in a moment. And that reference, that filing system might not always update. In fact, whether or not you fully import media bringing the files into the media management system or not, which we'll be covering later, there's still a reference to all of the media associated with your projects. Avid Media Composer uses a media database to manage its media.
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While we are still thinking about the media files associated with this course, it's worth highlighting a little tip to help you if you find that Media Composer loses your media or just doesn't update properly when you move the contents of your storage drives around.