What is a IPSW File Type?
The iPhone files are located in the following locations.
Mac OS X # 91; user # 93; / Library / iTunes / iPhone Software Updates.
Windows XP:\ Documents and Settings\ [User name ]\ Data related to the application\ Apple Computer\ iTunes\ iPhone Software Updates\.
Windows Vista and 7: user]\ AppData\ Roaming\ Apple Computer\ iTunes\ iPhone Software Updates\.
For iPod updates, replace " iPhone &" " " iPod &" in the directories below.
They are created in .ZIP format. You can therefore unzip them using n' any Zip decompression utility. The archive contains encrypted .DMG files, including a store of the contents of the filesystem. This file can be decrypted with the help of tools such as VFDecrypt, iDecrypt and iDecryptIt.