What is the best way to store pdf in ionic

Hi there, I am a totally new developer and I am now learning Ionic. (please forgive me if I ask anything stupid )
currently I need to store pdf and some chat img locally, so user can access it offline. In this case, should I use pouchDB+sqlite to save them as attachment or I should use codorva FileTransfer plugin to download them and access it with a local url later?

Hi @dannyq,
In a similar way, I need to do it in ionic v4. Need to store pdf in offline storage using SQLite. Have you done anything if yes could you please help me out? Its urgency for me and could not find the right resource for this.