Files on demand - difference in 'locally available' and 'always available' files

[Chris Le Texier]

I'm a bit confused with the two ways that a file can be saved to view offline.  What is the difference between the 'locally available' files and 'always available' files?  I saw the overview online, but it doesn't really tell me if the locally available files are cached somewhere or what... 

Will locally available files that aren't opened after a certain amount of time go back to 'online only' or ...? 

Thx in advance!

[#2]

@Thomas Habersatter 

Yes, as long as you have an Internet connection the locally available file gets update with cloud changes and vice Versa.