imac moved photo library space not released
Quite a while ago I moved all my iPhoto libraries from my SSD to HD2 to save space. Everything seemed to go OK and I eventually moved all the libraries to Photos. I am now getting disk space warnings on HD 1 and info shows 249 GB of 250 GB used.
I use finder and I don't see any big files and no libraries. So I use 'About this Mac' and I select storage I see graphically that a huge amount of space is dedicated to Photos. Clicking 'Manage' I see that there is 126.03 GB of storage used by Photos. However using Finder I can't see any libraries.
Clicking on the list of recommendations for managing the 'Photo's' the only option is move to iCloud.
Question: how do I remove or reclaim this space?