If you want to secure the capacity easily, it is recommended to use the storage optimization function from [Recommended] displayed in [General] → [iPad Storage] from the "Settings" app.
Enabling iCloud photos is also effective
The storage optimization feature may also display an item called iCloud Photos. When enabled, the photos and videos you take will be automatically uploaded to iCloud and saved in full resolution in their original format. The iPad, on the other hand, remains a smaller version depending on the capacity required.
Also, if the item "Review downloaded videos" is displayed, you can delete the videos stored in the "TV" app. You will be kindly asked if you have watched or not watched the video, so be sure to delete what you watched.
Check the current storage status
You can get some capacity with the storage optimization feature, but it may not be enough. In such a case, next, open the "Settings" app → [General] → [iPad Storage] and see the current storage usage graph displayed at the top.
You can see the amount of content consumed by the categories of [App], [Photos], [Media], [Email], [Books], [Messages], [iCloud Drive], [Others], and [System]. Of these, [System] is the capacity consumed by the iPad OS and cannot be reduced by the user, but other content can be manually deleted to recover the storage capacity.
For example, apps that tend to consume a lot of storage are listed in order from the one that consumes storage at the bottom of the screen, so you can tap the one you don't need to delete it. Apps that are not used often are automatically deleted by the storage optimization function, so if there is something that you normally use and consumes a lot of capacity, consider using it on your iPhone or Mac, and use it from your iPad. Let's delete it.
Delete content and cache
If your Photos are consuming a lot of storage in your storage usage graph, you need to organize your photos and videos in the Photos app. Open the "Photos" app and manually delete photos and videos you don't need, or check the photos in [Recently Deleted Items] and [Hide].
[Media] is a little difficult to understand in the storage usage graph. This item refers to music, video (included outside of the "Photos" app), podcasts, ringtones, artwork, and voice memo data. Therefore, delete music data, video data, ringtones, etc. from the "Music" app, "Podcast" app, and "Voice Memos" app. Also, if your graph consumes a lot of [Books], open the "Books" app and delete unnecessary ebooks and PDFs.
Of the items displayed in the storage usage graph, [Other] is the most difficult to understand. It shows Siri voice and fonts, dictionaries, logs, caches, search indexes, keychains and other data. Most of them are necessary for the operation of the iPad OS and cannot be deleted by the user, and logs and cache files (for storing data once used and displaying it quickly next time) are automatically executed when the storage capacity becomes low. It is designed to be deleted.
However, you may be wondering what to do if [Other] is consuming too much storage. Also, temporary files such as logs and caches may not be erased properly and may remain, so if you are worried about it, try the following method.
The first and easiest thing to do is restart your iPad. Most of the cache is automatically cleared when the system starts up, so you can restore capacity by turning the iPad off and then on again. Also, the next thing I want to try is manually deleting Safari's cache files. You can delete it by selecting [Clear history and website data] from [Safari] in the "Settings" app.
In addition, although it takes time and effort, you can expect the greatest effect by initializing the iPad. You need to back up and restore your iPad data, but if you want to get as much space as possible, we recommend you to give it a try.
Let's review daily usage
So far, I've shown you some ways to recover your iPad's storage capacity, but if you've tried these methods and the storage fills up quickly, use it for your own purposes. The storage on your iPad may not match. The iPad does not allow users to add storage by themselves, so be sure to choose the appropriate storage size the next time you upgrade your iPad.
Or, if you want to continue using your current iPad, you may be able to solve the chronic storage shortage by regularly following the method introduced here and at the same time reviewing the "usage" of the iPad. Make good use of cloud storage such as iCloud and Dropbox, or external storage, especially if your iPad's local storage is under pressure with content data such as photos, videos, and music.