I organize all my music, including songs, as shortcuts on my desktop. I imagine something similar can be done on a smartphone (in my part of paradise I don't have cell access so I don't use a smartphone).
In the desktop's Songs folder individual songs are listed with a link to a saved document. That document contains song lyrics and chords, and links to those, lessons, and YouTube vids of the songs (or my own iTunes library).
I also maintain a notebook of printouts of that same document, i.e., the song sheets (chords and lyrics). At the bottom of the printed page are links to the source of the chords and lyrics, YouTube videos, and GT or other lessons.
I backup those files, both on the computer and on an external hard drive.
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins