Microsoft has been fighting back with its own cloud-computing products, including a service called SkyDrive that offers 25 gigabytes of free storage. Although that’s 25 times as generous as Google’s service, SkyDrive can’t store individual files larger than 50 megabytes, one-fifth the limit now imposed by Google Docs.

Those needing more Docs space can buy it at prices ranging from $17 annually for an extra 5 gigabytes to $14,000 annually for an extra 4,000 gigabytes.

Subscribers to Google’s $50-a-year premium Docs service will continue to get more advanced features.

The increased capacity will be phased in by the end of the month, Google said.

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