借助 iCloud备份(Backup)，Apple 基于云的存储服务提供了一种极其便捷的方式来保护您 iPhone 上的数据。不幸的是，各种原因（例如与连接相关的问题和冲突的系统设置）可能导致 iPhone 无法备份到 iCloud。
值得庆幸的是，让 iCloud Backup(Backup)再次在您的 iPhone 上运行并不需要太多努力。因此，您可以尝试以下 15 个修复程序。
以下故障排除提示适用于 iCloud 云备份的以下问题：
- iCloud备份(Backup)中的“立即备份(Back Up)”选项显示为灰色。
- iCloud备份(Backup)会导致错误，例如“上次备份无法完成”。
- iCloud Backup 备份(Backup)时间过长或卡在“预计剩余时间”。
- iCloud备份(Backup)似乎存储空间不足。
1. 连接到无线网络
iCloud Backup仅适用于Wi-Fi，因此如果您在 iPhone 上使用蜂窝网络带宽进行互联网连接，则无法将数据备份到 iCloud。手动(Manually)启动备份也不起作用，因为“立即备份”(Back Up Now)选项（位于“设置”(Settings ) > “ Apple ID ” > “ iCloud ” > “ iCloud 备份(iCloud Backup)”下）在移动数据上显示为灰色。
即使您已将 iPhone 连接到Wi-Fi网络，弱连接也可能导致 iCloud 备份需要异常长的时间才能完成。尝试将 iOS 设备靠近路由器或接入点，以确保完整的 Wi-Fi(Wi-Fi)信号强度。
2. 给你的 iPhone 充电
您的 iPhone 电池还必须有至少 50% 的电量，才能进行自动或手动 iCloud 备份。如果没有，只需将设备连接到充电器，就可以了。
3.检查系统状态
如果您继续遇到 iPhone 无法备份到 iCloud 的问题，最好检查一下服务器端是否有问题。您可以通过访问Apple 的系统状态页面(Apple’s System Status page)来做到这一点。
如果iCloud Backup(iCloud Backup)旁边的状态表明该服务有任何问题，您必须等到Apple解决问题。这通常应该在几个小时内发生。
4.切换飞行模式
尝试在 iPhone 上切换飞行模式。(Airplane Mode)这有助于重新启动Wi-Fi无线电并有助于解决轻微的连接问题。为此，请打开iPhone 的控制中心(iPhone’s Control Center)并点击飞行模式(Airplane Mode)图标。然后，等待几秒钟，然后再次点击它。
软重置网络路由器(Soft-resetting the network router)（如果可以物理访问）或更新 iPhone 的 IP 租约(renewing your iPhone’s IP lease)也可以解决 Wi-Fi 连接的奇怪问题。
5.更改DNS服务器
使用广泛使用的 DNS（域名服务）(widely-used DNS (Domain Name Service))设置您的 iPhone可能会帮助它毫无问题地找到相关的 iCloud备份(Backup)服务器。谷歌 DNS(Google DNS)是一个不错的选择。
因此，首先转到设置(Settings )> Wi-Fi，然后选择活动的 Wi-Fi 连接。然后，点击Configure DNS，选择Manual，并将任何现有的DNS条目替换为以下内容：
8.8.8.8
8.8.4.4
点击保存(Save )以应用更改。请注意，它们不会替换您可能保存在 iPhone 上的其他 Wi-Fi 连接的DNS服务器。(DNS)
6.禁用低数据模式
低数据模式(Low Data Mode)有助于节省 Wi-Fi 网络的带宽，但它也会限制后台活动，例如自动 iCloud 备份。这可能会导致 iPhone 无法备份到 iCloud 等问题。坚持(Stick)手动备份或通过转到设置(Settings )> Wi-Fi并关闭活动 Wi-Fi 连接的信息(Info )窗格下低数据模式旁边的开关来(Low Data Mode )禁用低数据模式。(disable Low Data Mode)
7.禁用低功耗模式
低功耗模式(Power Mode)是另一个阻碍后台活动的内置 iOS 功能。虽然您的 iPhone 必须至少充电 50%，但启用低功耗模式(having Low Power Mode active)可以停止自动 iCloud 备份。您可以通过转到设置(Settings )>电池并停用(Battery )低功耗模式(Low Power Mode)旁边的开关来关闭它。
8. 释放 iCloud 存储空间
如果您在 iCloud 上几乎没有存储空间，您的 iPhone 将暂时暂停 iCloud 备份，直到您释放更多空间。
要管理您的 iCloud 存储，请前往“设置”(Settings ) > “ Apple ID ” > “ iCloud ” > “管理 iCloud(Manage iCloud) ” 。然后，您可以查看和删除任何不需要的数据形式。或者，轻点“更改存储计划”(Change Storage Plan)以升级到下一个 iCloud 存储层。
9. 重启你的 iPhone
重新启动 iPhone 可以快速解决 iOS 中出现的大多数问题。因此，打开“设置”(Settings )应用并点击“通用(General )” > “关机”( Shut Down)。设备完成关闭后，按住侧面(Side )按钮重新启动它。之后尝试执行 iCloud 备份。
10.更新iOS
如果 iCloud 备份未启动或继续失败，更新您的 iPhone 可以帮助解决与该功能相关的任何已知错误和问题。
为此，请打开“设置”(Settings )应用并转到“常规(General )” > “软件更新”( Software Update)。点击下载并安装(Download and Install)。
11. 开启/关闭 iCloud 备份
您也可以尝试打开和关闭 iCloud 备份(toggling iCloud Backup on and off)。这可能会处理任何与您的 iPhone 不备份到 iCloud 的随机连接相关的障碍。为此，请前往Settings > Apple ID > iCloud并关闭iCloud Backup旁边的开关。稍等(Wait)片刻，然后重新打开。
12.删除以前的备份
您的 iPhone 会逐步将数据备份到 iCloud，因此当前基于云的副本的任何不匹配或损坏问题都可能是导致 iCloud备份(Backup)失败的原因。删除它并启动完整备份会有所帮助。
为此，请打开 iPhone 的设置(Settings )应用程序并转到Apple ID > iCloud >管理存储(Manage Storage)>备份(Backups)。然后，选择您的 iPhone 备份并点击删除备份(Delete Backup)>关闭并删除(Turn Off & Delete)。
13. 退出/重新登录 iPhone
如果上述修复均无济于事，请尝试注销然后重新登录您的 iPhone(signing out and then back into your iPhone)。为此，请打开“设置”(Settings )应用并点击您的Apple ID。通过点击退出(Sign Out)来跟随它。
退出后，重新启动 iPhone，重新打开设置(Settings )应用程序，然后点击登录 iPhone(Sign in to your iPhone )以登录设备。
14. 使用 iTunes 或 Finder 备份
您还可以使用 iTunes 或Finder启动到 iCloud 的备份。首先通过(Start)USB将您的 iPhone 连接到Mac或 PC，然后点击信任(Trust)。然后，选择您的 iPhone，选择将 iPhone上最重要的数据备份到 iCloud(Back up your most important data on your iPhone to iCloud)选项，然后选择立即备份(Back Up Now)。
15.重置网络设置(Reset Network Settings)或所有(All)设置
执行网络设置重置可以解决与连接相关的潜在问题，而执行完整设置重置通常有助于解决由错误配置的设置引起的问题。
要访问您的重置选项，请打开“设置”(Settings )应用并转到“通用(General )” > “重置(Reset)” 。然后，根据需要选择重置网络设置( Reset Network Setting)或重置所有设置(Reset All Settings)以重置您的 iPhone。
注意：(Note:)网络设置重置后，您必须从头开始重新连接到任何以前保存的 Wi-Fi 热点。如果您选择重置 iPhone 上的所有设置，您还必须重新配置与可访问性、隐私等相关的所有首选项。
已修复 iCloud 备份问题
上面的修复列表应该可以帮助您解决 iPhone 无法备份到 iCloud 的问题。如果没有，您最好的选择是联系 Apple 支持(contact Apple Support)以解决您的 iCloud 帐户特有的任何问题。我们强烈建议您同时将 iPhone 的数据备份到 Mac(backing up your iPhone’s data to a Mac)或PC。
iPhone Not Backing Up to iCloud? 15 Fixes to Try
With iCloud Backup, Apple’s cloud-based storage service provides an incredibly cоnvenient waу to safeguard the data on yoυr iPhone. Unfortunately, vаrious reasons—suсh as connectivity-related issueѕ and cоnflicting system settings—can reѕult in the iРhonе not backing up to iCloud.
Thankfully, it doesn’t take much effort to get iCloud Backup working on your iPhone again. So here are 15 fixes that you can try out.
The following troubleshooting tips apply to the following problems with iCloud Backup:
- The “Back Up Now” option in iCloud Backup is grayed out.
- iCloud Backup results in errors—e.g., “The last backup could not be completed.”
- iCloud Backup takes too long to back up or is stuck at “Estimated time remaining.”
- iCloud Backup appears to be out of storage space.
1. Connect to Wi-Fi
iCloud Backup only works with Wi-Fi, so if you use cellular bandwidth for internet connectivity on your iPhone, you can’t back up data to iCloud. Manually initiating a backup also won’t work since the Back Up Now option (located under Settings > Apple ID > iCloud > iCloud Backup) appears grayed out on mobile data.
Even if you’ve connected your iPhone to a Wi-Fi network, a weak connection can cause iCloud backups to take an unusually long time to complete. Try keeping the iOS device close to a router or access point to ensure full Wi-Fi signal strength.
2. Charge Your iPhone
Your iPhone’s battery must also have a charge level of at least 50% for automatic or manual iCloud backups. If not, just connect the device to a charger, and you should be good to go.
3. Check the System Status
If you continue to experience problems with the iPhone not backing up to iCloud, it’s a good idea to check that there’s nothing wrong on the server-side. You can do that by visiting Apple’s System Status page.
If the status next to iCloud Backup indicates any issues with the service, you must wait until Apple fixes the problem. That should typically happen within a couple of hours.
4. Toggle Airplane Mode
Try toggling Airplane Mode on your iPhone. That helps reboot the Wi-Fi radio and helps resolve minor connectivity issues. To do that, open the iPhone’s Control Center and tap the Airplane Mode icon. Then, wait for a few seconds and tap it again.
Soft-resetting the network router (if it’s physically accessible) or renewing your iPhone’s IP lease can also fix the odd hitches with your Wi-Fi connection.
5. Change DNS Servers
Setting up your iPhone with a widely-used DNS (Domain Name Service) just might help it locate the relevant iCloud Backup servers without issues. Google DNS is a great choice.
So start by heading over to Settings > Wi-Fi and select the active Wi-Fi connection. Then, tap Configure DNS, choose Manual, and replace any existing DNS entries with the following:
8.8.8.8
8.8.4.4
Tap Save to apply the changes. Note that they won’t replace the DNS servers for other Wi-Fi connections you may have saved on your iPhone.
6. Disable Low Data Mode
Low Data Mode helps conserve bandwidth on your Wi-Fi network, but it also restricts background activities such as automatic iCloud backups. This can cause issues like iPhone not backing up to iCloud. Stick to manual backups or disable Low Data Mode by going to Settings > Wi-Fi and turning off the switch next to Low Data Mode under the active Wi-Fi connection’s Info pane.
7. Disable Low Power Mode
Low Power Mode is another built-in iOS functionality that hinders background activity. While your iPhone does have to be charged to at least 50%, having Low Power Mode active can stop automatic iCloud backups. You can turn it off by heading over to Settings > Battery and deactivating the switch next to Low Power Mode.
8. Free Up iCloud Storage
If you have little to no storage left on iCloud, your iPhone will temporarily pause iCloud backups until you free up more space.
To manage your iCloud Storage, go to Settings > Apple ID > iCloud > Manage iCloud. You can then review and delete any unwanted forms of data. Or, tap Change Storage Plan to upgrade to the next iCloud storage tier.
9. Restart Your iPhone
Restarting your iPhone can act as a quick fix for most issues that crop up in iOS. So open the Settings app and tap General > Shut Down. Once the device finishes shutting down, hold down the Side button to reboot it. Try performing an iCloud backup after that.
10. Update iOS
If iCloud backups don’t initiate or continue to fail, updating your iPhone can help resolve any known bugs and issues associated with the functionality.
To do that, open the Settings app and go to General > Software Update. Follow by tapping Download and Install.
11. Toggle iCloud Backup On/Off
You can also try toggling iCloud Backup on and off. That just might take care of any random connectivity-related snags with your iPhone not backing up to iCloud. To do that, go to Settings > Apple ID > iCloud and turn off the switch next to iCloud Backup. Wait for a moment, and then turn it back on.
12. Delete Previous Backups
Your iPhone backs up data incrementally to iCloud, so any mismatches or corruption issues with the present cloud-based copy might be what’s causing iCloud Backup to fail. Deleting it and initiating a full backup can help.
To do that, open the iPhone’s Settings app and go to Apple ID > iCloud > Manage Storage > Backups. Then, select your iPhone backup and tap Delete Backup > Turn Off & Delete.
13. Sign Out/Sign Back Into iPhone
If none of the fixes above helped, try signing out and then back into your iPhone. To do that, open the Settings app and tap your Apple ID. Follow that by tapping Sign Out.
After you finish signing out, restart your iPhone, re-open the Settings app, and tap Sign in to your iPhone to sign in to the device.
14. Back Up Using iTunes or Finder
You can also use iTunes or Finder to initiate a backup to iCloud. Start by connecting your iPhone to a Mac or PC via USB and tap Trust. Then, select your iPhone, pick the Back up your most important data on your iPhone to iCloud option, and select Back Up Now.
15. Reset Network Settings or All Settings
Performing a network settings reset can resolve underlying connectivity-related issues, while performing a full setting reset helps fix problems induced by incorrectly configured settings in general.
To access your reset options, open the Settings app and go to General > Reset. Then, select Reset Network Settings or Reset All Settings to reset your iPhone as needed.
Note: After a network settings reset, you must reconnect to any previously saved Wi-Fi hotspots from scratch. If you choose to reset all settings on your iPhone, you must also reconfigure any preferences related to accessibility, privacy, and so on.
Issues With iCloud Backup Fixed
The list of fixes above should’ve helped you fix issues with the iPhone not backing up to iCloud. If not, your best option is to contact Apple Support to sort out any problems specific to your iCloud account. We strongly recommend backing up your iPhone’s data to a Mac or PC in the meantime.
