Apple just released iOS 8, but if you're preparing to update your iPhone or iPad then be ready to clear out enough free space. While previous iOS updates have always required around 1GB of free space, a large number of iPhone and iPad owners are noticing that iOS 8 requires up to 5.7GB of free space to install. The number varies depending on device and increases up to 7GB on some iPad models, but if you have an 8GB iPhone 5C or even a 16GB iPhone then you're likely to run into issues.
There's no easy fix to free up space quickly, but you can use the iTunes client on Mac or PC to update a device to avoid the huge space requirement. The iTunes method will still require free space, but not nearly as much as 5GB using the over-the-air upgrade method on the device. If you've been lucky enough to upgrade already, check out the best iOS 8 features you may not know about.
From the archives: A visual history of iOS