Hello Litatolvy,
Thanks for reaching out to Apple Support Communities. It sounds like you're having an issue with 'Other' storage increasing on your iPad. We're happy to help.
Is the iPad this is occurring on updated to iOS 13.6.1 or later? If not, we recommend creating a backup and updating the iOS as this issue was addressed with an update. You can view the information here: Clear Other storage on your iPhone or iPad
If needed, the article here can help you create a backup to iCloud or iTunes prior to updating: How to back up your iPhone, iPad, and iPod touch
Should you be unable to update wirelessly, we recommend using the assistance of a computer: Update your iPhone, iPad, or iPod touch the section "Update your device using your computer" has the steps.
Best!