Is 5 GB of extra storage really $1,440 per year?

Is 5 GB of extra storage really $1,440 per year?

One of my clients has a 4-user Enterprise Edition CRM.  After a sale is closed they want to scan a number of documents and attach those to the Potential in Zoho CRM.  When the job is completed there are a few additional files/documents that could be attached to the Potential as well to keep all of the information together.

When estimating their storage requirements today I realized that they only have 500 MB for the whole organization/account, and a good chunk of that is already used after just a few weeks.  And then I was shocked to see that it would cost $1,440 each year for only 5 GB additional storage.  Is that correct?

I know everyone has to make money somehow, but that amount is absurd.  For comparison, 5 GB of storage at Amazon would cost about $16 per year (including 10 GB / month data transfer).  And 50 GB of storage at Dropbox is about $120 per year.

Please let me know what's up with the storage costs quickly because we'll need to come up with an alternate solution.