System Data too high on iPad Air (4th Gen)

Young_Scarlxrd Said:

"System Data too high on iPad Air (4th Gen): So, I got an alert on my iPad saying that the storage was too full, so I thought maybe my apps were the ones causing this problem, so I deleted a whole bunch of apps, but still got the same alert.[...]"

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Ridding of "System Data" (Formerly Called "Other"):

Back up your iPad, and then restore your iPad form a backup. For reference, refer to my User Tip:   How to Clear "Other" in your iPhone's Storage - Use Backup - User Tip

If your internal storage is full, your only option is to better manage the storage that you have - and delete unused Apps or unneeded data. 

These support pages should prove to be helpful - the last of which may have particular relevance to your predicament:

About storage on your device and in iCloud – Apple Support

What's the difference between device storage and iCloud storage? – Apple Support

Manage your iCloud storage – Apple Support

How to check the storage on your iPhone, iPad and iPod touch – Apple Support

Clear Other storage on your iPhone or iPad - Apple Support

“Offloading” Apps can be a helpful method of creating temporary space for a software update.

https://9to5mac.com/2020/01/21/how-to-offload-apps-in-ios-to-save-space-without-deleting-their-data/

Additional information about creating sufficient space for installation of a software update can be found here:

If you need more space for an update on your iPhone, iPad, or iPod touch - Apple Support

Updating your iPad using a PC or Mac computer can reduce the amount of free-space necessary to perform an update - as the initial download, unpacking and verification is performed on the computer prior to installation. However, even this method is not possible if your iPad has too little free space.

As for your System Data…

As you can see from this screenshot, System Data includes various system caches, logs and system resources. The only element that you can directly influence is perhaps your browser caches - which you can manually clear if you need to do so.

For Safari:

Settings > Safari > Clear History & Website Data

For other browsers, you’ll need to find the relevant section of the App settings - which may be within the App itself.

Otherwise, transient system caches can be significantly reduced by performing a forced-restart of your iPad - although caches, by their nature, will again accumulate and be automatically managed by the operating system.

Forced-restart

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On other iPad models: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.