“Apple is sending out warning letters to iCloud customers that received a complimentary 20GB storage upgrade that the offer expires on September 30th,” Bryan Chaffin reports for The Mac Observer.

“On October 1st, those users will be bucked down to the 5GB of storage that normally comes with iCloud,” Chaffin reports. “The offer was originally extended to MobileMe paying subscribers who moved their accounts to iCloud between October 12th, 2011 and August 1st, 2012.”

Chaffin reports, “While iCloud nominally comes with 5GB of free storage, MobileMe customers were automatically upgraded to 25GB total storage… Apple currently charges US$40 per year for an additional 20GB or $50 per year for an additional 50GB of storage.”

Read more in the full article here.

MacDailyNews Note: To check your current iCloud Storage levels:

On Mac: System Preferences/iCloud (the total is shown at the bottom of the dialog box with a green status bar)
On iOS: Settings/iCloud/Storage & Backup

[Thanks to MacDailyNews Reader “Fred Mertz” for the heads up.]