I agree! This is/has been a problem for me, too with photographs. I’m saving the best of our institutional photos that we currently have in Flickr. I cherry pick the highlights and have put them into a Flickr folder in Preservica. At some point, I would like to put them, more appropriately with the offices or events on campus that align with archival provenance/best practice. But dragging those folders around is a precarious business. I would love to see another process to accomplish this.

In the paid-for product, we can also drag and drop but before it moves things, it displays a message which says where things are about to be moved to, and asks for a confirmation - so that you can avoid inadvertently moving them to a wrong location.

In addition, we can right-click on the thing we want to move and select ‘change archival structure’  from a menu - that allows us to select precisely the folder we want it move to.

This functionality may not be available to you as the free version has limited features.