I have a lot of apps that no longer work in iOS 11, similar to Little Eden's question: How do I bulk delete incompatible apps in iOS 11, but my issue is not so much being able to bulk delete these apps (but that would be nice), it's the fact that many some of them contain data I can no longer access.
How do I retrieve this data? I don't mean encrypted data or anything fancy like that. I mean apps that contained data like word documents, excel spreadhseets, and PDFs.
Best Answer
You should be able to use iTunes to save all the data from these apps after the fact, but it's far better to export and save off data before you upgrade since you can't restore a device back to iOS 10 to run the apps or check on what data you need.
More specifically - once you are on iOS 11:
Now you can save the documents you want by selecting them and clicking on the Save to... button at bottom right.
NOTE: If you don't see the Save to... button at bottom right, scroll the window up so you can see it.