Hello GNit,

the data of the Userarchive are stored in simple tables
in the runtime-database.
The data of the Taglogging-Archive are stored in a
compressed manner as binary data in different
archivesegments in the subfolders "Archivemanager/
Taglogging Fast" or "Archivemanager/Taglogging Slow"
of the projectfolder.
In the Reportdesigner are Table-or Trend-Objects
available for displaying the data.

If you would like to export the data by script,
have a look to the Application example:
"Export of archive data using the SIMATIC WinCC/Connectivity Pack
(OLE DB Provider)"

https://support.industry.siemens.com/cs/ww/en/view/38132261

Regards

Georg Berghof