After upgrading to macOS Catalina, you may be surprised to discover a shortcut on your Mac’s desktop to a Relocated Items folder that wasn’t there previously. The generation of this folder is actually normal behavior when upgrading an older version of macOS to Catalina, but we’re highlighting it in this article because a lot of users are confused about why the folder exists and what to do with its contents.
What Are Relocated Items?
Relocated items are older files and data from previous macOS installations that Apple is not sure what to do with after upgrading to Catalina.
Catalina is the first version of macOS to adopt wholesale the relatively new Apple File System (APFS), which is optimized for the flash storage used in recent Macs. Aside from introducing a bunch of other new technical features, an APFS-formatted disk uses a space-sharing “container” that can house multiple secure “volumes” or file systems. This allows the disk’s free space to be shared on demand and allocated to any of the individual volumes in the container as required.
Read more at MacRumors.com