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My iCloud is not backing up my device (iPhone 4 with iOS 5.0.0) completely.

When I try to backup my Contact List or Mails via iCloud; It only backups the newest added contacts or recent mails. (Beginning from last restore) For example. I have 220 contacts, I added 10 more after updating to iOS 5 (fresh restore) When I run iCloud. It only backups the 10 contacts.

Is this how it is supposed to work?

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In what way is it not backing up your device completely? What is the expected behavior? What behavior do you observe? –  Daniel Lawson Nov 3 '11 at 0:24
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Note: "backup" does not include "sync" ... Also: things (music, apps...) purchased from the iTunes store won't be counted as part of the total space occupied by the backup ... if those two don't cover your problem, you will need to tell us what your problem is, as Daniel said. –  GEdgar Nov 3 '11 at 0:38
    
I mean, when I try to backup my Contact List or Mails via iCloud; It only backups the newest added contacts or recent mails. (Beginning from last restore) For example. I have 220 contacts, I added 10 more after updating to iOS 5 (fresh restore) When I run iCloud. It only backups the 10 contacts. –  nightrider84 Nov 3 '11 at 10:26
    
You have category "iCloud" in Contacts.app. I have all my contacts in iCloud while it backups only changed. Do you have same? –  Eir Nym Nov 10 '11 at 10:49
    
No absolutely not.. But I found a way I guess, will test sometime. –  nightrider84 Nov 10 '11 at 13:19
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2 Answers 2

up vote 2 down vote accepted

Here a link to a Macworld article that contains a terrific explanation of how iCloud backups work. The answer to your question is that iCloud performs incremental backups--only what has changed since the last backup will be sent to iCloud on the following backup.

This means that, for example, if the initial iCloud backup contained 2.0 GB of data and then only 0.1 GB of data changed (say, Address Book contacts), then only those 0.1 GB will be sent to iCloud. This saves battery and avoids transferring data that iCloud already knows about. This is the same principle behind Time Machine on the Mac.

(There are other nice things that iCloud does for the sake of efficiency. For instance, your iTunes purchases are not sent to the iCloud backup, only their references, since Apple already has the songs themselves in iTunes)

In general, I would say that if you backup regularly, then each subsequent backup should stay relatively small and should complete in a short time. The exception is, naturally, when you have recently added large amounts of media like photographs or video taken from the Camera app.

I recommend giving that article a read. It is very comprehensive. Hope this helps.

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Well, Apple will likely be doing incremental backups in order to keep space requirements down, so it means it will only backup the changes from last time. However, that assumes that a complete backup has been done once first, not sure if this is the case for you? (e.g. the first backup should be of all your contacts).

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I think so. I have a way, and I will try one day when I'm available. I'll write back. –  nightrider84 Nov 24 '11 at 13:04
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