How do I delete Gmail and Books to free up space on my iPad?

Re: My iPad 10th generation storage is full.

Seems it is always wise to back up everything of value on an iPad before freeing up storage space..

That way, if you find you need something you deleted, it can be restored from the back-up.

How to make space using recommendations:

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

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Re: how do I delete G-mails

For the iOS 18 Mail app: (Am guessing your GMail is stored in the iPad's Mail app )

See how to: Delete and recover emails in Mail on iPad - Apple Support

Eg says:

"Delete emails

There are multiple ways to delete email messages. Do any of the following:

1. Go to the Mail app on your iPad.
2. Do any of the following:

• • While viewing a Primary message: Tap above the message.
• While viewing a message list: Tap Select, then select the messages you want to delete by tapping their

checkboxes. Tap Trash at the bottom of the message list.

• Important: When you select a Transactions, Updates, or Promotions message, you’re selecting all the messages in that category from the sender.
  • While viewing a sender’s digest view: Swipe left on a message, then tap .

To turn off the deletion confirmation, go to Settings  > Apps > Mail, then turn off Ask Before Deleting (below Messages).

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Re: How do I delete G-mail, and books to make more room?

Apple Support's online article: Organize books in the Books app on iPad - Apple Support

Eg: says:

"Remove books, audiobooks, and PDFs

You can remove books, audiobooks, and PDFs from Home and your library collections, or hide them on your iPad.

1. Go to the Books app  on your iPad.
2. Navigate to a book or audiobook you want to remove, then tap below the cover.
3. Tap Remove, then choose an option.
4. Note: If you choose Remove Download, the content and data associated with the title are no longer stored on your iPad. To redownload the title, tap , then tap Download. If you choose Hide Book, the book won’t appear in your library or collections. To unhide books and audiobooks, tap Home, tap your account icon, then tap Manage Hidden Purchases.

You can automatically remove downloads from your iPad after you finish a book.

Tap Library,

then tap at the top right of the screen.

Tap Remove Downloads, then tap Automatically When Finished."

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Please Note:

Any digital media you buy from Apple can be permanently downloaded on to an iPhone, iPad, Mac, or Windows PC.

More info: About purchasing movies, TV shows, music, books, and ringtones from Apple - Apple Support