Storage space

Q: How do I find out how much memory space do I have available? Is it possible to add (buy?) memory?
A: The blog is free; but any photos or videos that you upload to your blog will automatically create a Picasa web album on the internet. The first 1Gb for Picasa is free. You can buy more Gb if needed

http://picasa.google.com/support/bin/answer.py?hl=en&answer=39567

When you have used up 80% of your allocated free allowance you will receive an email alert from Google. On your Gmail screen, near the bottom click on [manage] to see how much storage space you have left.


Some useful links:
http://picasa.google.com/support/bin/answer.py?answer=43879
http://picasa.google.com/support/bin/answer.py?answer=39567

source: http://www.google.com/support/forum/p/blogger/thread?tid=47bf36e6ab89e6bc&hl=en