I'm trying to restore my iPhone from backup (because my kid did accidentally deleted an app with a lot of important data). The process could not be completed due to low disk space. I have freed some space and tried again, only to fail again.
Now there is again no disk space left. It seems like the "Restore from Backup..." option in iTunes extracts the backup somewhere on disk, but when it fails, it does not clean up after itself. How can I reclaim this space (on Mac)? How much free space is required to restore 32GB iPhone 4 from backup?