The answer of this question is "Yes". You can backup RAW files to your Dropbox account. Dropbox allows you to backup photos, movies, documents, music, internet downloads and much more. RAW files are large in size as compare to .jpeg file type. A RAW file can be from 10 MB to 50 MB and it takes more time to upload and download. Dropbox allows you to open and preview files directly from the browser. Dropbox offers 2 GB of free storage space, so it is not enough to store RAW files. But, you can upgrage your free 2 GB account to a paid yearly subscription plan for more storage space. It offers 100GB space for $99/year, 200GB space for $199/year and 500GB space for $499/year.
You can install PicBackMan's Dropbox uploader for Mac from the website and start backing up photos and videos.
Quick Tip to ensure your Photos never go missing
Photos are precious memories and all of us never want to ever lose them to hard disk crashes or missing drives. PicBackMan is the easiest and simplest way to keep your photos safely backed up in one or more online accounts. Simply download PicBackMan (it's free!), register your account, connect to your online store and tell PicBackMan where your photos are - PicBackMan does the rest, automatically. It bulk uploads all photos and keeps looking for new ones and uploads those too. You don't have to ever touch it.