Switched from MacBook to PC Windows with External Hardrive; ERROR

Hi @Salvador36313740djk8! Welcome to the community!

Just checking if you're still experiencing this issue?

Thanks!

Alek

The first screenshot shows an error that can be solved as follows: Go to Preferences- Lightroom Sync and specify a normal folder for incoming synced images. Click the 'Choose' button. Right now the root of your hard drive is selected, but Lightroom Classic does not have access to that.

I believe the second and third screenshots show a problem that is caused by the difference between how MacOS handles disks using a disk name and Windows by using drive letters. This cannot be solved at the disk level itself, but must be solved at the folder level. Expand the two drives with no name, then 'relink' the top folder on each drive. https://www.lightroomqueen.com/lightroom-photos-missing-fix/

Do note that Windows cannot read MacOS-formatted drives, however. If you stored your images on such drives, you will first have to copy them to a drive that is formatted in ExFAT, so MacOS can write to it and Windows can read it. 

There is no longer any software named Lightroom CC, and usage of this term just causes confusion. However, your screen captures make it clear that you are using Lightroom Classic. Please use the term Lightroom Classic from now on.

I am expereiecing the following issues. 

What steps in Lightroom Classic causes this error to appear?

What happens if you click on the Grey triangle to the right if the \ in the Folder Panel? Can you show us a screen capture (using the "Insert Photos" icon) of what you see when you click on the grey triangle?