The MobileMe to iCloud transition for developers is expected to generate an extra 5GB storage space in addition to iCloud’s 20GB plan.

Apple has said that during the time of the transition, all the existing MobileMe accounts will remain active until June 30, 2012. The company, however, hadn't clearly mentioned anything about the shifting of the storage requirements to iCloud as the current MobileMe customers have 20GB of storage in their annual plan.

The Cupertino-based company has now decided to automatically sign up MobileMe users to the 20GB plan in iCloud free of cost. The existing 20GB will see a boost of extra 5GB. Previously the iCloud additional storage pricing, which provided 25GB Storage, was at a yearly price of $40.

The users will be automatically signed up for billing with the next payment date set to be June 30, 2012 which will be the same date when MobileMe shuts down. The user may downgrade before that time free of cost.

iCloud is expected to arrive along with iOS 5 this fall, according to a MacRumors report.

MobileMe is a subscription-based collection of online services and software which is offered by Apple Inc. The service was originally launched on January 5, 2000, as iTools which is a free collection of Internet-based services for users of Mac OS 9. Apple later re-launched it as .Mac on July 17, 2002.