If you need to edit or transfer files on the iPhone and you are using windows, WinSCP is the program you need which allow the usage of STFP (secure file transfer protocol).

steps:

1. You can get WinSCP from this link
2. First make sure you have ssh. you can get ssh on your iphone frm cydia. goto search > ssh.
3. Find your iPhone’s ip is next thing you need inorder to proceed.
goto Settings > Wi-Fi > (Your Wifi connected to) > Look under IP Address
4. Next open WinSCP.
5. Enter the ip address in the dailogue box that appears.  Leave the port as it is, the username and password is

username: root
password: alpine

enter any seession name and press login.