You are about to upgrade from a previous version to DAM for Sitecore (DFS). Which requires your attention.
Updating the module to DFS 10.4.0
Install the new
DAM for Sitecore-10.4.0-U.zip
package and overwrite all when asked.
It is important that you install the package tagged with a U. This means that it is a upgrade package. If you install the package wihout a U, then all synchronized assets will be deleted and you have to do a full synchronization of the assets. if you have a lot of assets in your DAM, then this task can take a long time.
After updating:
If you are upgrading from DFS 8.x, follow this step otherwise continue to the next step. Since we removed the DFS membership provider. You have to assign the role sitecore\Digizuite DAM for Sitecore Users to the user extranet\Anonymous. If you don't do this, you won't be able to see any DFS assets on the public website as the anonymous user.
Add the silo item through the Installation Wizard again which you packed in step 2a.
If you're updating from below 10.0.0, then continue to the following page: DFS 10.4.0 - Keeping the Silo Updated. If not, then you can skip this step.
Now you should be fully done with the update.