Like any cloud-based service, iCloud is susceptible not only to local server-based problems that can cause brief outage issues but also to wide-area interconnect problems that can cause it to be unavailable when you need it the most. These types of problems can be beyond Apple’s control. They can involve your local ISP, network gateways and routers, Internet connections, peering points, and half a dozen other points of failure that can occur between you and the Apple cloud servers.
How to Back Up Calendars From Your Mac
iCloud stores data in an application-centric system. That is, instead of a pool of storage space you have direct access to, storage space is assigned to each app that uses iCloud; only that app has access to its storage space. This means that you’ll need to use various apps to do the backing up for you.
How to Back Up Calendars From iCloud
You have another option to save your data from the Calendars app: using the official iCloud website.
How to Back Up Contacts from Your Mac
You can also manually download your contact data for safekeeping in case you need to access it offline. Here’s what to do.
How to Back Up Contacts From iCloud
Like Calendars, you can also back up your contacts from the iCloud website.
Backup Schedule
Consider backing up your iCloud files as part of a good backup strategy in your routine practice. How often you need to perform this procedure depends on how often your Contacts and Calendar data changes.