How to detect total available/free disk space on the iPhone/iPad device?

Question

I\'m looking for a better way to detect available/free disk space on the iPhone/iPad device programmatically.
Currently I\'m using the NSFileManager to detect the disk s

Answer 1

Important clarification (at least for me). If I connect my iPod to my Mac this is the info showed by iTunes App.

When I use the above code:

long long freeSpace = [[[[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:nil]
                            objectForKey:NSFileSystemFreeSize] longLongValue];

NSString *free1 = [NSByteCountFormatter stringFromByteCount:freeSpace countStyle:NSByteCountFormatterCountStyleFile];

[label1 setText:free1];

NSString *free2 = [NSByteCountFormatter stringFromByteCount:freeSpace countStyle:NSByteCountFormatterCountStyleBinary];

[label2 setText:free2];

The countStyle NSByteCountFormatterCountStyleFile show me: 17,41 GB

The countStyle NSByteCountFormatterCountStyleBinary show me: 16,22 GB

16,22 GB (NSByteCountFormatterCountStyleBinary) It is EXACTLY the number that iTunes App show me when I connect my iPod to my Mac.