IDisk

iDisk was a cloud storage service that was operated by Apple to all .Mac members so they could store their digital photos, movies or personal files online.

History
iDisk was introduced as part of iTools on January 5, 2000 and was continued as part of .Mac and MobileMe.

iDisk integrated with Mac OS X appearing as a network drive mounted automatically on the desktop. Mac OS X 10.3 allowed users to use their iDisk when offline, and synchronise with it when they went online.

Discontinuation
iDisk and MobileMe said 30 days left on June 1, 2012. On June 23, 2012, MobileMe said 7 days left. After June 30, 2012, iDisk was discontinued and iCloud Drive replaced it, with MobileMe and .Mac accounts automatically converting over to iCloud.