iTunes and iCloud backups each contain a lot of data, and they're broadly similar. Apple describe what is stored in each backup type in their knowledge-based, but they don't cover off the rules that influence what is stored and when.
|Always stored||Documents, data from third-party apps, location history, device settings, voice memos||Documents, data from third-party apps, location history, device settings|
|Only stored if encrypted||Health data, Keychain, Screen Time passcode||N/A|
|If iCloud Photo Library disabled||Photos & videos||Photos & videos|
|If cloud-based Contacts service not enabled||Contacts||Contacts|
|If "Messages in iCloud" not enabled||Messages||Messages|
|Never stored||Email, Apple Pay data, Face ID and Touch ID settings, iTunes or iCloud Music Library Music, Apple Books||Email, Apple Pay data, Face ID and Touch ID settings, iTunes or iCloud Music Library Music, Apple Books|
If you are using iTunes backups and your backup is not encrypted, it won't contain Health data or saved passwords (ie. your Apple Keychain and Screen Time passcode). If you are using an encrypted iTunes backup, it will be broadly similar to an iCloud backup in terms of its content.
iTunes 또는 iCloud 백업에 포함 된 데이터
- 내장 된 Apple 응용 프로그램의 데이터 : 메모, 캘린더, 메시지 (iMessages, SMS, MMS), 통화 기록, Safari 브라우저 기록, 사진, 비디오, 음성 메일
- 데이터를 백업에 저장하는 타사 앱의 데이터입니다. 실제로 이것은 대부분의 경우입니다. WhatsApp, Kik, Hike, Viber, WeChat 등은 모두 풍부한 데이터를 백업에 저장합니다.
- 위치 기록 데이터
- 장치 및 네트워크 설정
- 키 체인, 키백 및 암호 데이터
- 많은 법의학 데이터
이 데이터 중 일부가 포함되지 않도록 수동으로 백업을 구성 할 수 있습니다.
iTunes 또는 iCloud 백업에 포함되지 않은 데이터
- 기본 Apple Mail 앱의 이메일 메시지
- iTunes 음악 및 비디오
- iOS 앱 설치 (
- ID 및 얼굴 ID 데이터를 터치합니다.
Why might data be missing from an iTunes or iCloud backup?
Choices you make with Apple's services can affect the types of data that are stored in your backups. For example, if you enable iCloud Photo Library, that service will act as the main store of your photos and videos. Yes, they'll be synced on your phone if you use it, but they won't all necessarily be backed up, irrespective of whether you choose "Optimise iPhone Storage" or "Download and Keep Originals".
This seems odd at first, but it makes sense when you think about it: if Apple are storing all of your photos in iCloud Photo Library, would you also want them to store a duplicate of all of your photos in a backup? After all, your iPhone wouldn't be the primary home for that data: the iCloud is. So including them in an iTunes backup would slow down the backup process, and eat up your storage space, and backing them up in the iCloud would essentially mean each of your photos was stored twice.
Enabling following services will mean data isn't always stored in your backups:
- iCloud Photo Library -- as your photos and videos will be stored in iCloud Photo Library and only synced with your phone when needed.
- iCloud or Gmail Contacts -- as your contacts will be stored in the cloud and synced with your iPhone when needed.
- Messages in iCloud -- as older messages may be removed from your iPhone and stored in the iCloud, and thus won't be on your phone to be backed up.
The free version of iPhone Backup Extractor will let you easily examine your backup, if you're concerned that it might be missing data. If you'd like to read more, we've got articles on key files in iTunes backups and where apps stored data in iTunes backups.