BenchReady — External drive missing: record its state before writing to it
Windows 11 with an external storage device that is absent from File Explorer. This is an observation and handoff guide, not a data-recovery procedure.
Outside this guide: Do not apply new-disk initialization instructions to a disk whose contents you want to recover. Server dynamic-disk and RAID repair procedures are outside this guide.

STOP: If files matter, cancel prompts to initialize or format. Do not create a volume on unallocated space. Stop for physical damage, unusual sounds or repeated disconnections and seek a qualified data-recovery/service assessment.

PREPARE
[ ] Whether the drive contains files you need
[ ] A backup status you can verify
[ ] Authorization to inspect Disk Management on the PC

CHECKS
1. Establish the data priority
Before troubleshooting, decide whether the disk is empty, backed up, or holds the only known copy. Leave uncertain contents marked unknown.
2. Inspect without changing the disk
Open Disk Management from the Start button’s context menu. Identify the external disk carefully by its displayed size and connection; inspect only, and cancel any initialization prompt.
3. Record the displayed state
Note whether the disk is absent, Offline, Not Initialized, RAW, Unallocated, or has a Healthy volume. Record whether a drive letter exists. Avoid making changes while the intended disk or data status is uncertain.
4. Choose the appropriate handoff
A missing letter on a healthy volume, a damaged file system and an undetected device are different situations. Provide the observed state and backup status to support. If recovery is needed, preserve the disk rather than following new-disk setup steps.

OBSERVATIONS
Contents priority: Not checked
Choices: Not checked / Wanted files; only known copy / Wanted files; backup verified / Known empty drive / Contents unknown
Visible in Disk Management: Not checked
Choices: Not checked / Yes / No / Unable to inspect
Displayed state: Not checked
Choices: Not checked / Healthy volume / Offline / Not Initialized / RAW / Unallocated / Other or uncertain
Drive letter: Not checked
Choices: Not checked / Present / Missing / Not applicable
Physical concern: Not checked
Choices: Not checked / None observed / Damage or unusual sounds / Repeated disconnections
Next step: Not checked
Choices: Not checked / Ask about drive letter / Pause for data recovery / Ask about device detection

NEXT STEPS
Healthy volume with no drive letter: Ask for the drive-letter route after confirming the intended volume. Keep the existing file system and contents intact.
RAW, Unallocated or Not Initialized with wanted files: Pause before any operation that writes new storage structures. Request data-recovery advice with the state you recorded.
No disk is visible: The connection/device path is unresolved. A missing listing is not proof the disk is empty or safe to initialize.

OFFICIAL SOURCES
Microsoft: Disk Management in Windows: https://support.microsoft.com/en-us/windows/experience/storage-filemanagement/disk-management-in-windows (checked 2026-10-20)
Microsoft Learn: Troubleshoot Disk Management: https://learn.microsoft.com/en-us/troubleshoot/windows-server/backup-and-storage/troubleshoot-disk-management (checked 2026-10-20)

Guide: https://csl-15-device-repair.pages.dev/guides/windows11-external-drive-record/
Keep credentials, recovery keys, personal files and serial numbers outside this worksheet. A recorded observation is not proof of a physical repair.