FreeFileSync Mapped Drive Missing in Scheduled Task
Fix mapped network drives that appear in Explorer but disappear in scheduled FreeFileSync jobs.
Quick answer
Scheduled tasks can run in a different logon context, so interactive mapped drive letters may not exist.
What to check first
Use a UNC server/share path where practical and ensure the scheduled Windows account has network credentials.
Windows-specific factors
Test read and write access under the exact account used by the task before enabling unattended runs.
Safer troubleshooting workflow
Store logs locally and make missing-destination failures visible instead of treating them as successful backups.
How to verify the result
After changing paths, compare manually and verify that source and destination were not reversed.
Frequently asked questions
Should I change sync mode to fix this?
Not until the underlying cause is identified. First verify paths, permissions, comparison results, and logs.
Is a successful sync the same as a verified backup?
No. Important data should be checked at the destination and periodically restored to a separate location.
Related: all FreeFileSync Windows guides