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Deep Scan should be used when lost files have not been found during Quick Scan. During this procedure, R‑Undelete deeply analyzes all data on the disk including parsing information about files and searching for files using their file signatures .
While Deep Scan starts, additionally found files are added to the corresponding tabs automatically. All file search settings and marking will be cleared.
Deep Scan is also greatly improves estimations for chances of successful file recovery .
Deep Scan progress appears at bottom of the the R‑Undelete window.
Depending on your hardware, scan time may vary, even within the same scan process, and may be quite lengthy for large disks. Deep scan may be paused then resumed it by clicking the Resume scan button.
R‑Undelete stores the scan information for a scanned storage device or its disk(s) and loads it automatically once the storage device is connected again.
It also warns the user that the scan information is obsolete if it's seven or more days old and deletes it after 30 days.
If R‑Undelete finds a previous partition with a different file system, it shows a special message:
You may switch to the second partition and recover files from it: