Appendix C: File Extension to MIME Types
AWS Import/Export uses MIME types as defined by the Internet Assigned Numbers Authorities (IANA). To determine MIME type, AWS Import/Export does a case-insensitive lookup against the MIME type table on the IANA website. To see that table, go to http://www.iana.org/assignments/media-types.
Unrecognized file types use the Amazon S3 default Content-Type of