Flickr allows you to backup photos at their original resolution size. When you share photos with your family & friends, they have the option to download the photos in original, high-quality or a smaller size so that they will take up less space on their computer. You can upload multiple photos & videos from computer to Flickr at once. Once you upload photos to Flickr, you can add tags, make sets or albums, add people & add to groups.
You can install PicBackMan's Flickr uploader for Mac or Flickr Uploader for Windows to backup and upload photos and/or videos to your Flickr account (one or multiple), automatically. PicBackMan is the best Flickr Uploadr alternative to automatically & seamlessly backup all your photos and/or videos to one or more of your Flickr accounts.
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.
... an excellent job of uploading more then 300GB of photos to 2 different services