If u are looking to backup all your photos...and if the size of each photo is in MBs...then here's the answer...

The winner is Free Image Converter

and here's the link: http://www.freeimageconverter.com/downloads.aspx

Excellent software...just 1 mb size and batch processing is possible...

i was able to compress the photos from nearly 5 GB to 350 MB..isnt that awesome??

Try it out and give me the reviews....

i would recommend picasa as the best site for sharing ur photos...whether its download or upload...its totally convenient...