I started cleaning up my Mac and I've noticed that the Photos App's Library was using roughly 72,5GB (info I see in
~/Photos). Long story short, I had around 8.000 items in there from the last 2,5 years; and, in there, there were duplicates, failed photos and videos, junk received via messages, etc.
Anyway, spent about 4h cleaning and checking everything up and I ended up deleting around 3.000 items. After this, the Photos' Library shows that is using 70GB which seems a bit absurd to me (3.000 * ~5MB = 15.000MB).
As a result, it seems I've managed to clear only 2,5GB of space, which seems far too little for 3.000 items. I made sure that I've deleted all the items from "Recently Deleted" as well.
Is there any way to free some space? Maybe Photos has a 'clean space' trick that I am not aware of, or it has some kind of mechanism to even recover permanently deleted items.