Reduce use of the affected drive
New files and software installations can overwrite deleted information. Avoid saving more data to that storage.
Check existing backups
Look for the files in a separate backup or a cloud service’s recovery options. Do not restore over the affected drive until you understand the impact.
Power down a failing drive
If storage clicks, repeatedly disconnects or has physical damage, stop using it and arrange an assessment.
Describe what happened
Record whether files were deleted, the drive was formatted, or the computer stopped working. Recovery options depend on the cause.