Save Photos Library to external drive to connect to Windows PC
I want to save/make copy of my Photos Library to an external HD which I would give to my son so he can connect to his Windows PC and use Microsoft Media photos viewer (or whatever it is called) to view these photos. Can this be done? I use all current versions of MAC OS and Photos, on a 2017 21" iMac. All photos are saved on the iMac in the Photos Library.photoslibrary
It is large - 140gb.
I do also have all photos synced to my iCloud, but I have Photos preferences selected to "download originals to this Mac", thus the large file on this iMac.
Can I just make a copy of the library onto the ext HD, or must I do something like: select all, then drag them onto the ext hd, or some version of that step?
Thanks for any advise.
iMac 21.5" 4K, macOS 10.14