Photo - uploading
Photo Uploading tutorial

Posting a photo in a message

The example shown below is the progress indicator for a photo that is being uploaded. 
Large full size photos take more time to upload than smaller photos - this is due to your camera setting.
The example shown is using the Google Chrome browser.  Internet Explorer, FireFox or other browsers may differ in how they display uploading progress.  

 How to upload photos

You can reduce photo sizes by two methods.
One is to adjust your camera settings to record smaller photos.  This will result in faster load times but reduced photo quality.
Second is to process the images in software such as PhotoShop Elements on your computer or online software such as http://www.picresize.com/