Too many solid state memory?

I counted today, and I have the following:

1. 1 piece of 1G and 1 piece of 4G MiniSD inside my mobile phone

2. 2 pieces of 2G SD for my DC

3. 1 piece of 8G SD for my DSLR

4. 1 piece of 512M SD for my DSLR, but now only used for photo-development outside, another piece of 512M SD died

5. 2G thumbdrive

And inside my new PC, I have 4G memory but then only 3G is useable by Windows XP, and fortunately, I'm also a Linux user :-)

Over 20G!