Dahua DH-XVR5104HS-4KL-I3 User Manual page 233

And then click
Double-click on the playing page to switch between full screen playing and thumbnail
playing.
You can also do the following operations to the recorded files.
To export the database file (.csv) to the external storage device, select files, click Export,

and then select the save path.
To back up the recorded files to the external storage device, select files, click Backup,

select the save path and file type, and then click Start.
To lock the files to make it unable to be overwritten, select the files, and then click Lock.

To add a mark to the file, select the files and then click Add Tag.

5.11.2.4 Face Recognition (For XVR7X-I series only)
Face recognition applies to AI preview mode and smart search.
AI preview mode: Supports comparing the detected faces with the face database, and display the

comparison results.
Smart search: Supports faces searching by faces attributes or portraits.

If you select AI by device, then among face detection and recognition, IVS function, you can use

one of them at the same time for the same channel.
Before enabling face recognition function for a channel, the face detection must be enabled first

for this channel.
5.11.2.4.1 Face Database Management
You should create a face database for comparing the detected faces and the faces in the database. The
Device supports creating maximum 20 databases and registering 100,000 faces.
to start playing back the recorded detected face snapshots.
Backup
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User's Manual