When using Amazon S3 you can add files using "add a resource/file" and select them from Amazon S3 (assuming you have setup the Amazon S3 repository with a secret key and access password), however anything selected which is in a subfolder within the bucket doesn't display, while files in the root of the Amazon bucket display fine. It appears that moodle is merging the foldername in with the file name and combining them into a single file name that it then looks for and can't find.

For example "file.pdf" stored in a bucket called "folder" is appearing in moodle as "folderfile.pdf". If the same file is put into the root of the bucket it appears in moodle as simply "file.pdf" and displays fine.

We tested this with both pdf and .m4v files on two separate installations of Moodle and in both cases those in the root of the bucket displayed fine while those in a subfolder didn't.