If Windows won't format your USB drive to the FAT32 file system, remove the write protection or use CMD, PowerShell, or free software to do the same.

This guide show how to format a USB drive to FAT32 file system using File Explorer and Disk Management tool on a Windows 11/10 PC.

If you need to format a USB flash drive, here's how it's done on all three major operating systems.

However, they can also have format errors that make them “undeletable.” Further reading: How to format USB sticks and external drives in Windows Such situations no doubt are frustrating.