An outdated version of 3uTools may lack the drivers necessary for the latest iOS firmware.
Select the targeted firmware version, then check the option.
If a full storage partition is preventing the APFS volume from mounting, attempting to preserve user data will continuously generate Error -75. A fresh wipe is required. 3utools error unable to restore idevice--75-
The error code typically surfaces during the or "Updating NAND Firmware" phase of a flash. The underlying reasons generally fall into three distinct categories:
Check the box next to before clicking the Flash button. 4. Perform a Clean Erase via DFU Mode An outdated version of 3uTools may lack the
Hardware instability is the root cause of error -75 in the vast majority of cases.
: Switch to an original Apple USB cable and plug it directly into a rear USB port on your PC. A fresh wipe is required
If you see an error when you update or restore your iPhone, iPad, or iPod
Error -75 is heavily linked to inadequate current flow while updating firmware blocks. ERROR: Unable to restore iDevice(-75). - Apple Community
If 3uTools fails repeatedly, many users have found success by switching to DFU (Device Firmware Update) mode and using the official Apple iTunes
: Unstable USB ports or outdated drivers can disrupt the "Writing Filesystem" phase. : Update to the latest version of 3uTools and ensure your Apple drivers are repaired via the iTunes Utility in the 3uTools Toolbox. Hardware Conflicts