A disk unknown not initialized (https://notchox.com/resources/how-to-fix-disk-unknown-not-initialized/) Windows 10/11 error indicates that Windows is unable to access the partition information on the drive. The first step to fix this issue would be to launch the Disk Management tool by right-clicking the Start menu and choosing Disk Management. It would be wise to find out whether the disk is offline, has the proper capacity, or an unknown status. In case it is an external drive, one should try a different cable, port, and PC. An initialization procedure would be needed for a completely blank disk without any data on it. If there was some data on the drive, then one should avoid any formatting, initializing, or creating a volume to consider data recovery options later.