If your device is unresponsive, a manual reboot usually fixes the issue: iPod Reset Utility 1.0.4 for Windows - Apple Support (IS)
If you have opted for a third-party tool because Apple's utility failed, here is the workflow: ipod shuffle 4th generation reset utility
It bypassed the standard OS file system to re-partition the flash memory. If your device is unresponsive, a manual reboot
When standard troubleshooting fails, you stop searching for generic fixes and start searching for the . If your device is unresponsive
Because Apple's built-in tools sometimes fail to recognize a deeply bricked Shuffle, third-party developers have created dedicated utilities. The most famous (and safe) is (by WindSolutions) and iMazing .
The restore process completely erases all music and data on your iPod, and installs current iPod software on it. Apple Support