If you are just moving the volume files to a new drive, but not moving the volume to a new repository, there are a couple of options.

You can change the volume's paths...

If you modify a physical volume's fixed path, files in that volume will be automatically moved to the new location. (This is true of non-logical volumes and of individual physical child volumes within a logical volume. Modifying a logical volume's fixed path, however, will cause the next child volume to be created in the new location, but will not move existing child volumes. This allows you to easily divide a logical volume across multiple hard drives without needing to move individual existing volumes.) Modifying the removable path will not update the location of the physical files; they will need to be manually copied to the new location.

You could also make the volume read-only, use something like xCopy to copy all files to the new location, and contact Laserfiche support for a SQL script to update the volume paths in the Repository database.

I personally like using the last option. Changing the volume path does not give you a progress indicator, so it's hard to know where it is at in the process.