Zilla is the #1 photo uploader to automatically backup your photos to your Flickr account.
Users in 130+ countries have backed up.
... Finally a tool adapted to my use of digital photography and Flickr!
If you are falling short of bandwidth or for any other reason you need to pause photo uploads from a folder to your Flickr account, simply click the 'pause' icon. You can pause the Uploadr for as long as you need. Zilla will not upload new photos from this folder until you resume automatic upload. Refer the screenshot below.