If you use Apple's discontinued cloud synching service MobileMe, and still haven't transferred your data to iCloud, then you better put that on your to-do list.

Apple is now sending out notices to MobileMe users via email and iPhone alerts, informing them that the service is going to end in just 30 days. The Cupertino tech giant is advising users to transition over to iCloud or risk not being able to use email.

To being the transition, users should visit me.com/move. When users log in through this portal, Apple will port their Mail, Contacts, and iCal information to iCloud.

Not all MobileMe data is transferable to iCloud, however. Namely, when MobileMe shuts down on June 30, any sites that have been published with iWeb, as well as MobileMe photo galleries, and files on iDisk will all cease to exist. So, you're probably going to want to back up this data with another method, or risk losing it.

The news was first reported by 9to5Mac.

Apple has been warning users for nearly a year that MobileMe is going away, and will be replaced by iCloud. Late Apple chief Steve Jobs unveiled iCloud during a keynote appearance at last year's Worldwide Developer Conference (WWDC). The service lets users store all of their content in the cloud, including iTunes music, and it will automatically push stored content to all of their devices.

iCloud requires iOS 5, OS X Lion, Windows 7, or Vista SP 2. If your devices do not meet these requirements, Apple will still let you transition your email address on incompatible devices.

Apple has also set up a page with frequently asked questions about the MobileMe transition to iCloud.

Meanwhile, recent rumors indicate that Apple is planning to upgrade iCloud with new photo-sharing features. The new features are expected to be announced at WWDC, which takes place from June 11-15 in San Francisco. PCMag will be there, so stay tuned.

For more, see PCMag's full review of iCloud and the slideshow below.

[Image Credit: @AKISNET]