File Requirements for attaching files
Individual files cannot exceed 10 MB.
If multiple files are uploaded the total cannot exceed 15 MB.
Media
.jpg, .jpeg, .jpe, .png, .gif, .mp4, .m4a, .vid, .qt, .mov, .mpeg, .mpga, .mp2, .mp2a, .mp3, .m2a, .m3a, .msvideo, .ogg, .3gpp, .webm, .webp, .flac, .wav, .tiff, .mkv, .mk3d and .mks.
Docs
.doc, .docx, .dot, .xls, .xlsx, .ppt, .pptx, .odp, .odt, .potx, .ppsx, .pdf, .txt, .text, .conf, .def, .list, .log, .in and .ini.
Other
.zip, .otf, .woff and .woff2.