IDisk

iDisk is a service offered by Apple to all .Mac members so that they may store their digital photos, movies or personal files online.

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

Size
The combined size of iDisk and .Mac Mail is 250 MB.

Access
Apple builds direct access into iDisk directly into Mac OS X.