Hi, and welcome to the Magix forums.

Photo Manager is, essentially, a database. In other words, it maintains in its .alb files a list of where each photo/image/video etc. is actually stored on your computer. It does not actually actually hold those images in its .alb files, merely a reference to where they are stored.

So, you could simply select to copy the existing .alb files to your external hard drive. But if you move an .alb file to a different computer (by connecting that external drive to the second computer) Photo Manager will still be trying to access those pictures on the original computer. When it finds it cannot now access them it will produce an error message.

In order to do what you want you will need to move ALL the images/photos/videos etc. which Photo Manager references, to your external hard drive, recreate the albums in PM, store those .alb files on this drive and then use that drive, with its .alb files and all the images to which those .alb files refer connected to the second computer.

All the above also assumes you have Photo Manager installed on the second computer.

I think you can also change a Program Setting to nominate a new storage file for your .alb files. I don't have PM but assuming its interface is similar to virtually all other Magix programs, in PM Edit>Settings>Program (? shortcut Y)>the folders tab is the place to look to be able to set a new folder to store those files.

HTH

Jeff