Hi Armstrong14,
the following is taken from the PRS-650 user guide..
The following file formats can be managed within Reader Library and transferred to your Reader.
EPUB file (.epub file extension)
EPUB (OPS version 2.0) supported
PDF file (.pdf file extension) Support is based on the PDF 1.6 specification.
BBeB (.lrf or .lrx file extension)
Text file (.txt file extension)
RTF file (.rtf file extension)
Word file (.doc or .docx file extension)*1
*1 In case of using Windows, you need Microsoft Word installed on your computer. Word files will be automatically converted to RTF files by Reader Library during transfer to your Reader or a compatible memory
card.
