Not long ago everything was offline.
Then online became available,
Then online became available,
Despite fears, online has pretty well taken over, even for backup of a computer.
From the beginning there were questions about online safety. Suppose it went away, would we lose our books, music and photos?
The more probable exposure is that our media will not be there when we need it, as when we are away from WiFi. Wifi is not always reliable, either.
Cell coverage is more reliable, but much more expensive.
So, getting down to the point, how do we make everything available offline, available when we need it, wherever we are?
For convenience, I decided to put music on a Kindle Fire 7. I added 128 GB SD memory for the purpose. Alternatively I could have put it on a memory stick with Wi-Fi. And indeed, I did that, but for backup.
Kindle books went downloaded to a second Kindle Fire 7. Google Books, however, required the use of internal memory, and I needed another device with plenty of internal memory for them.
I had consolidated all my music.
LPS and 78s had been converted earlier to digital format on a PC, using software originally developed for a Linux called Audacity, and a turntable sending the music to the PC.
CDs were converted by the PC, but using Apple iTunes. You just insert the CD and iTunes does the rest.
As others have abandoned CDs except for using in the car, I have collected some of them, especially popular music of earlier times.
Then I have accumulated some music from Amazon where you can get 100 piano concertos for $0.99, and so on. When I buy something from Amazon and choose not to have immediate shipment, I get a credit for such a purpose. There is also plenty of free music from the Internet Archive.
Consequently my music library takes up a little more than 64 gigabytes. Ten thousand pieces. It took more than 24 hours to send it from PC to Kindle Fire.
That means I can take with me all the music I would ever want to listen to.
My library of books similarly includes anything II would ever want to read, no need ever to go to the library.
Ask for photos, the only steps I have taken so far is to have them printed out book form. It would be a simple matter to download them to a Kindle Fire.