[GP20] What kind of file format can be supported by GP20 when using USB reader?

When using USB reader mode, GP20 supports following file formats -
• Document:
Adobe PDF 1.0~1.4 (PDF)
MS PowerPoint 97~2010 (ppt, pptx)
MS Excel 95~2010, Office XP (xls, xlsx)
MS Word 95~2010, Office XP (doc, docx)
• Photo: JPG (.jpg, .jpeg), BMP (.bmp)
• Music: MP3, MP2, MP1, OGG, AAC, WAV