One of my reservations about the Libre App was archiving the data. I finally figured out that it automatically uploaded to LibreView which is quite informative for helping you see what is happening, but also with a Diasend account it uploads to that too. Diasend seems quite widely used across the NHS and is an easy way tor the HCPs to see how you are doing. It is just BG though. None of the other stuff you put in.
The LibreView is not perfect either. All you can get is pretty (informative) graphs. You can't get anything other than BG exported. That's a shame. There's no search facility in the app, or the two management reporting systems either.
There's no perfect solution, that I have found anyway. What I'd like is something like MySugr for day to day, with database of foods, searchable to see what happened last tine you had a particular food, stats on daily carbs, exercise, etc. Then an ability to export all of that data purely for archive, or migrating to another system as tech changes. Seems to me we will be flushing it all away every time there is a change in tech.
That said, I never look at any of my old data, and I have spread sheets from day one of diabetes! I can tell you what I ate at any meal for the last 5 years!!! Never needed to though. Maybe I'm over thinking it. It's the result of being a nerd and working it IT for 30+ years I'm afraid.
Edit: mySugr does link with Libre now. As I read it, you can read with the LibreLink app, and it will populate the mySugr database, also uploading to LibreView and Diasend (if you install it)