Finally, the computer in 428M has limited disk space which will quickly fill up with scanned documents unless they are moved. If you are going to edit your scan extensively, it is best to save it as a BMP or TIFF file, so no information is lost. If you are scanning handwritten documents, such as test solutions, which are typically only black and white, uncheck the 'Scan in color' box on the panel that appears when you start scanning. Here is an example of a scanned quiz solution. It seems best to use PDF files to save such scans because the page stays the same size as the input.
Files are very large, but the ease of handling when printing seems to be worth it.
OCR IS Optical character recognition is scanning a text page and saving it as a text file. Typically, OCR software makes mistakes when interpreting images as text, but I have not seen errors using ours yet. RTF files are opened by Wordpad. If you check your results, you will see text displayed approximately as it was on the scanned page, with corresponding fonts, of course, up to limitations of the software. Positioning of text and paragraphs are not kept, so you just get a jumble of letters all together.