Some of Apple’s iCloud services are experiencing issues that could make them slower or completely unavailable to users.
According apple system status page, services like iCloud Backup, iCloud Bookmarks & Tabs, iCloud Drive, iCloud Keychain and Photos have problems that affect “some users”.
The status plate indicates that the problems started around 11:54 (Spanish time), so the interruptions are already longer than eight hours.
Apple did not provide details about the issue, other than the fact that accessing iCloud services may experience issues.

