How to transfer old SSD into new laptop?

Garyw said:

There must be exceptions to the ownership rules. As an experiment, I took a clone of the data drive from my other system and installed it in this system. When I double clicked on a folder on the clone drive, I got this message:

Attachment 346814
When I clicked on continue, I was able to open any folder and read the contents.
Attachment 346815

I use the same usernames and passwords on both systems, so maybe this is an exception?

It's not an exception. It is an example of the rule. The box popped up saying that you don't have permission to access the folder.

Thanks to everyone for your answers. As always, I’m glad to have found this site as it is an invaluable resource with the combined knowledge you all offer.
Thanks again.