Buzz
iPhones and iPads tend to fill up their storage space pretty quickly. Here's a strange yet effective way to recover several gigabytes of space within minutes.
The video above from iTwe4kz demonstrates the trick: Try renting a large movie (e.g., Lord of the Rings: Two Towers) on iTunes. You'll get a message saying you don't have enough space. Hit the Settings button in the prompt, and just like that, your device will have more available storage. Repeat as needed.
When I tested this, my iPad had only 912MB available, but after the first attempt, I had 2.5GB of free space.
While the exact reason behind this is unclear, Reddit user eavesdroppingyou, who shared this tip on the iPhone subreddit last month, speculates that it likely removes unnecessary data from other apps to make room for the movie download.
Ensure that your iPhone or iPad has less available space than the movie's total size, or you might incur a charge for it.
