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Windows 11 cannot extend the C: drive into unallocated space
Recently, after my laptop started having issues, I deleted a separate D: drive that had been created by a technician; the partition had originally been set up as a backup partition. I thought I could extend the C: drive into this now-unallocated space, but Windows won’t let me do that. The “Extend Volume” option is grayed out, and I’m not sure why.
Is there a workaround to merge this space back into the C: drive without losing any data? I’ve already deleted the D: partition, so the space appears as unallocated but is stuck there and cannot be used.
1 Reply
Deleting D: does not automatically make that space usable for extending C:. Windows Disk Management requires suitable unallocated space on the same disk, immediately to the right of the volume being extended. Your screenshot is cropped before the complete disk layout, so it does not establish what lies after C: or where the unallocated space is located. First, back up important files and provide a screenshot showing the entire Disk 0 row. If another partition separates C: from the free space, Disk Management cannot move it, and switching to PowerShell does not remove that layout requirement. Do not delete EFI or recovery partitions experimentally. If enlarging C: requires rearranging partitions, have the technician plan a backed-up migration or repartition-and-restore procedure. If the deleted D: contained files you still need, stop making changes and address recovery before formatting or reallocating that space
