As stated above, I just checked the usage and I'm listed at 5GB, but had heard in several tutorials that going from me.com to icloud, apple gave these users 25 GB?
You should have received a 20G bonus (for one year). When did you migrate your Mobile Me account?
What you got can vary. See this article.
When I moved to iCloud from MobilMe I got 25GB which is valid until September 2013.
You get 5G with iCloud, you received a 20G limited time bonus when you moved.
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