Resolving Memory Shortage Issue When Upgrading to iOS 8 on iPhone 6 plus, 6, 5s, 5, 4s

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Ngày cập nhật gần nhất: 15/4/2026

Many Apple enthusiasts eagerly await the official release of iOS 8 to update their devices, but encounter several glitches including the memory shortage problem.

Many of us are also excited to upgrade our devices to iOS 8, but when starting the upgrade process, we encounter a memory shortage error. Follow these steps to resolve this. The iOS 8 update requires at least 4.6 GB of free space.

Method 1:

1. Update your iTunes to the latest version for optimal support.

2. Restart iTunes and connect your iPhone, iPad, or iPod touch to your computer via USB connection.

3. Select your iOS device and click 'Update'.

4. Select 'Download & Install” to begin the update process.

This action aims to prevent excessive Cache memory on our iOS devices, thereby avoiding error notifications.

Method 2:

1. Navigate to Settings -> General -> Usage and identify apps consuming the most storage. Delete unused apps to free up space. To view all apps, tap Show all Apps.

2. Tap Delete App to complete the device cleanup. For iOS, consider deleting Camera Roll and Messages, which occupy the most space.

3. Backup your data by connecting your device to a computer. Open iTunes -> Summary -> select Back Up Now, or on your device, go to Settings -> iCloud -> Backup -> Back Up Now.

4. If you've completed all the above steps and still don't see an improvement in memory, restart your device by pressing the Home + Power buttons simultaneously.

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