New answers tagged conventions
I know that with Dropbox, that sort of data is dealt with differently - as a DataStore instead of normal files you would expect a user to store within Dropbox. They have a tutorial which deals with getting the users permission and creating and dealing with their DataStore to sync data. https://www.dropbox.com/developers-v1/datastore/tutorial/ios
The primary idea behind a backup for app data is to be able to retrieve the data in another environment or another point in time. In such cases the user would prefer if this retrieval happens automatically without the user's intervention. Hence the onus is one the app which is promising to back the data up to ensure the retrieval happens easily. Given all ...
Never heard of any such standards as there are multiple options available for where to store data. [root]/<appname>/<timestamp>/ Storing backup files in a folder with timestamp should be good enough. If you have multiple apps available then you can add one more level to backup path. [root]/<developer or ...
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