One trick is to get the "other" data from your iphone.

If you use the iphone to do all sorts of things, there must be a large portion of the device's storage space that is accounted for by other classes of data. Recently, an iphone user posted on the reddit that other types of data on their phones occupy up to 38GB of storage space. In the post, many iphone users have given advice on how to solve the problem. If you have the same problem, the following solutions may be useful for reference. First, get into your phone's information and other chat apps and delete what you no longer need. If you and your friends often share lots of pictures, gifs, and videos, this is where you need to look first. Next, check the storage space usage for each application. The specific way to do this is to go into setting up general usage management storage space, and then you can see which applications occupy the most space and decide whether to manually clean the cache or reinstall it. If this doesn't work, then you should back up your phone's data and settings to icloud, perform a restore of the factory settings, and then recover the data from the icloud. This is a very useful method because icloud does not back up other classes of data. When data is recovered, there should be no cryptic data on the phone.