Open the Para module (from the GEDI panel, click on Module->Para);
Click on the "+" symbol alongside the datapoint type you want to archive;
The name of the datapoint, together with a "mini folder" symbol, will appear;
Click on the "+" symbol. If the datapoint is composed of only one element then right click on the datapoint name: a scroll-down menu will appear. Move the pointer to the item "Insert config" and, in the new scroll-down menu, select "Archive settings";
An item "_archive" will appear under the datapoint name. Click on it;
In the pop-up window select "Store original value", then click on the text field on the right and select "RDB-99) EVENT" (I assume you have the Oracle database connection setup and active). Depending on the type of data, you might want to apply a smoothing to the data archived in order to save disk space: if you select "Smoothing", a list of options will appear. Usually you will choose a "value dependent smoothing" and hence set the Deadband value, either on a percentage basis ("relative value") or an absolute step (0.5 V, 1 mbar etc.);