iOS File System Extraction
For iOS 10 and Up
Starting with iOS 10.0 Apple decrypted the file system and kernel cache. All you have to do is download an
IPSW, change the extension to
.zip, and unarchive it. The largest size disk image inside the unarchived
zip will be the root file system. Simply mount it to see its contents.
For iOS 9 and Below
Originally from /u/RowRocka on Reddit. Gently edited for clarity.