Restore Idevice75 Link: 3utools Error Unable To

Avoid using USB hubs or front-panel ports on a PC. Plug the cable directly into the motherboard ports on the back of your computer.

DFU mode is a deeper state than Recovery Mode; it doesn't load the device OS, which bypasses many software-level "handshake" errors. 3utools error unable to restore idevice75 link

Sometimes, security software flags the restore process as a suspicious data transfer and "cuts the link," leading to Error -75. Avoid using USB hubs or front-panel ports on a PC