Data Rescue keeps the different scans that have taken place in its workspace. The Manage Scans feature allows you to continue a previously suspended scan or delete previous scans which are no longer needed. By keeping previous scan results in the workspace, Data Rescue allows you to return to the earlier scan results to recover additional files.
The Choose Workspace feature also allows you to select a different location for the workspace folder. If the workspace location is changed, scans stored in the original workspace will no longer appear, but any scans stored in the new workspace will appear. If the workspace is changed back, the original scan results will once again appear.
Scans that are stored in the workspace are in a form that allows quick access to them. However, they can take up considerable space. The Manage Scans allows you to save one or more scans in a compressed .drscan file, after which you could delete those scans from the workspace. Later if you want to restore any of those scans to the workspace, you can load them from the previously saved .drscan file. This also works for suspended scans.

Manage Scans
Suspended scans may be resumed from the Manage Scans window. Ensure the same hard drive on which the scan was started is connected before resuming the scan.
To resume a suspended scan:
The previous scan will begin immediately and continue where the scan was suspended.
Saving scans allows a user to save the results of a scan into a .drscan file to be reloaded at another time. This feature is primarily useful to archive scan results for access at a later time, or on the same computer setup, without taking up workspace in the meantime. It could also be used when a scan needs to be continued on another machine. For example, consider that an external hard drive has failed and a scan was started on a MacBook, but the user decided they needed that MacBook for another purpose. The user may save the the scan file onto a separate device (such as a USB flash drive), connect the external hard drive to a different Mac computer, and import their scan with Data Rescue from that machine.
There are restrictions when resuming or accessing a saved scan. The scan must be accessed by the same basic type of Mac (PPC or Intel based), running the same major Mac OS version, and either the same or a compatible version of Data Rescue.
To save a .drscan file:
Please note that more than one scan can be saved, allowing you to archive multiple scan results into one .drscan file. The file must be saved on a separate device, not on the hard drive or volume that is missing the files.
As described in the previous section, a scan can be imported from a .drscan file.
To import a .drscan file:
The imported scans will be listed within the Manage Scans window. Once imported, you may select a suspended scan to continue, or go to the View menu and select Scan Results to view any completed scans.
Data Rescue archives all scans that it has completed within its workspace. These scans may take up several hundred megabytes to gigabytes of space. After a scan is complete and the data has been recovered from the drive in question, you may delete the previous scan from Data Rescue to reclaim the space on the hard drive. Deleting the scan is recommended only when the recovery process is completed. Once the scan results are deleted, the scan will need to be started from the beginning once again if further results were needed.
To delete a previous scan:
Data Rescue allows you to immediately review the results of any completed scans. This is very useful in case you have forgotten to recover some files from the first attempt, or if you have to take a break from the recovery process. If more than one scan is completed, Data Rescue will list any previous completed scans as shown below.
To review any previous scan results:
If the previous scan you wish to view is not visible, click and drag the little gray button in the middle of the left window area to the right until you can see the previous scan. Once the scan results have been reloaded, you may resume recovering data from reloaded results.