How to upload RAW files to Flickr?

RAW files are not in the presentation formats, so in order to view them, RAW files need to be converted into a JPEG format. Uploading RAW files for archiving purposes is a nice idea, but there are not many photo-sharing services that support RAW formats. 

In order to backup and upload RAW files you should search for another option that support RAW Files. Cloud storage are a good option to backup RAW files. Flickr as a photo-sharing website is brilliant, but if we talk about backing up or uploading RAW files, then it does not suffice our purpose. 
Even if you try to upload a RAW file to Flickr, they will be converted into JPEG formats, so that they are viewable to others. So, if you're thinking to upload RAW files along with all the information required to convert them to JPEG pictures, why not convert them NOW on your desktop and then upload the JPEGs to Flickr? Flickr has also clearly mentioned in the FAQ section. 
Have a look: 
"Flickr officially supports JPEGs, non-animated GIFs, and PNGs. You can also upload TIFFs and some other file types, but they will automatically be converted to and stored in JPEG format."  It clearly means that the browsers can't display RAW files, So, when you upload a RAW file, Flickr automatically converts them to JPG / JPEG without storing your original RAW files. Flickr only store copies in JPEG format. What we recommend is; do not rely on Flickr to convert your RAW files to JPEG, instead do it yourself so that you can assure that they look best. Relying on Flickr for conversion is like compromising on quality. Once all the editing and conversion is done, then you can upload the final picture to your 1TB Flickr account.

Your photo backup assistant

PicBackMan is a free photo/video uploader that helps you to keep your memories backed up to your favorite online services.

Users in 130+ countries have backed up.

Kip Roof

   ... an excellent job of uploading more then 300GB of photos to 2 different services

Alen Serafino testimonial I have a large collection of photos and videos to upload on some of my storage account and I was looking for an application that can do it all automatically, and that it did especially well. I found a definitive answer to my needs thanks to this amazing program and that it is constantly improving whith new fantastic features. - Alen Serafino
Gavin Whitham testimonial PicBackMan was really easy to setup and has been running for 3 days now backing up all my locally saved photos to Flickr. My photos are really valuable to me so it's great to be able to have them easily backed up to a secure location. - Gavin Whitham
Dave testimonial PicBackMan was an answer to many a prayer. How can I get this MASSIVE collection of photos onto a service that cripples uploading? PicBackMan. I uploaded approximately 85,000 photos in less than a month. It would have taken me close to a year to get all of those photos where they needed to go. Nothing short of brilliant. - Dave
Julia Alyea Farella testimonial LOVE this program! Works better than ANY other program out there that I have found to upload thousands of pictures WITH SUB-FOLDERS to SmugMug! Thank you so much for what you do! :) #happycustomer - Julia Alyea Farella
Your pictures are scattered. PicBackMan brings order to your digital memories. ...
PicBackMan automates the process of uploading pictures to multiple photo storage sites.
Top rated photo backup application. PicBackMan cnetdownload rating
It's easy, convenient and can handle thousands of pictures at once.