Auto-Upload automatically adds save data from your primary PS4 to online storage.
Your saves don’t Auto-Upload from a PS4 temporarily activated on your PSN account, so don't forget to upload your saves.
If Auto-Upload isn’t switched on or you want to upload a save from a temporarily activated PS4 you need to do this manually.
Select your local user and go to [Settings] > [Application Data Management] > [Saved Data in System] > [Upload to Online Storage].
With online storage, you can save your progress on one system and then continue on another later on. You can save up to 10GB of game save data.
If you sign into PSN on a friend’s PS4 you can pick up from the last save on your PS4. Don’t forget to manually upload your saves as they won’t upload automatically from your friend’s PS4.
If you get a new PS4, just sign in to PlayStation Network and download your game save data.
These games can be downloaded and played on more than one type of PlayStation system. For example, if a game is compatible with both PS4 and PS Vita, you can start play at home on your PS4 and continue later on your PS Vita.