It sounds to me like it's time for you to move to Wordpress. :)Blogger allows for 1GB total photo storage space. If in your total blog you've uploaded more than that, you won't be able to fit any more pictures into your blog.
I am so far behind! I had to buy storage about 2 years ago. I still buy it every year at about 5.00/ year
Don't just read, say something! Sorry, I had to add the word verification - I am being spammed.