I'd like to use Microsoft's OneDrive as a back up for my Olympus and Nikon RAW images. I don't plan to edit via OneDrive (in Lightroom or Photoshop) but upload and download large batches of images as needed. First question 1) Does MS OneDrive support the basic upload / down load of proprietary RAW files images and 2) Can I preview thumbnails of the RAW files in OneDrive? If not - can I tweak something to make it work? Thanks so much!