Question

So I have lots of application data for my application. However, This data does not necessarily need to be backed up to itunes.
Where would be the best place to store it?

Answer 1

You can put it in the caches directory

  NSArray* cachePathArray = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
  NSString* cachePath = [cachePathArray lastObject];

or the temporary directory

NSTemporaryDirectory()

Note that there have been some concerns with iOS 5 as it sometimes clears the caches directory (which previous versions of iOS didn’t, current iOS 5.0.1 in beta at the moment aims to solve this). You need to be careful when storing large files to the documents folder in iOS 5

  NSArray* documentPathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
  NSString* documentPath = [documentPathArray lastObject];

because of big iCloud sync times.