최대 올리기 용량. 파일당 2 MB. List of allowed file extensions jpg, jpeg, gif, png, ico, mp3, ogg, wav, webm, ogv, mp4, vtt, tgz, tar, gz, bz2, zip, rar, 7z, pdf, ps, rpm, deb, doc, xls, ppt, rtf, docx, xlsx, pptx, sxw, sxc, sxi, sxd, odc, odf, odg, odi, odp, ods, odt