EastScape Wikibuilt from the game itself

Page Folio

“One slot for every spell page you carry. Click it to put your pages in, take them out, or load your Magic Bag; when the Magic Bag runs dry, it refills from here. Sold in the Store. It can't be traded.”

Sold by

The Store: 100,000 tickets.

Can't be traded. Your page folio can't change hands.