Exporting a Photo Library from hard drive to iCloud.
I have a MBP late 2013 running Big Sur. I am trying to import a large Photos Library (124GB) from an external HD to iCloud.
When the external HD is connected to the MBP, this library appears in Photos as an option along with the systems library and I can open it in Photos. So, I know I can access the file from the HD.
I have plenty of space in my iCloud account, and Photos on my MBP appear there. However, when I attempt to import the library from the HD the file is greyed out and I am unable to choose that library.
Any suggestions on how to move my library to iCloud.
Thanks
iMac, OS X 10.11