As a professional tax preparer, I need to scan a lot. I use to scan (for the last few years) with one all in one machine and it was way too slow. In the last months, I was looking for a scanner not only fast but for one that let me scan directly to a flash drive without the use of a computer. With Raven Pro Document Scanner I found the answer to what I was looking for and more than that because it is one of the fastest scanners on the market and I can save my scans not only to a flash drive attached to the scanner but also to my google drive, one drive, raven cloud (raven cloud is free with unlimited storage), I can even send faxes (free), email from my scanner and all that without a computer. Also great support from the raven team.