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Subject: Re: File fransfer from iPad to FreeBSD
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> > They instead contain the incremental diff between the current state of
> > your app with your app data and the original.

This might be true, but I'm not sure if it is true. If so, the user
would get the old app release, instead of a new release. I suspect that
it's not a diff, but just the purchase meta-data and that the app is
downloaded again, but I might be mistaken here, while I'm definitively
not mistaken with the user data. Again, you synced without accidentally
deleting the app first. Such a sync is not a backup. A real backup would
allow to restore data, even if the app was accidentally deleted and then
reinstalled.