In other to insert media files into Posts, edit an existing post or create a new post. Depending on your type of post editor, click on the appropriate area for selecting media files.
Most editor screens for WordPress would look like the reference image that would come after the explanation below.
There are two ways to add media files into your post, they include:
Upload media files directly into post by selecting the file from the computer
Choose the media files from the existing files in the media library
If the first option is to be used, FileBird gives you the chance to select an already created folder category and then upload the file from your computer that automatically goes into that selected category and clicking on "Select" button will insert the media file into your post.
If the second option is to be used, FileBird also gives you the chance to select files to upload from the list of dropdown folder categories which are already created in your library area, thus clicking on "Select" button will insert the media file into your post.
See image reference for the "insert image" functions for post below: