Thank you for your reply
Yes the Optimize Mac Storage is already turned on.
And yes, the photo issue is very probably related to lack of space.
And this is getting even more exciting..
So when I bought this computer, I did not sync it to the previous one, but manually transferred only what I wanted to bring with me to the new one, to avoid bringing along hidden files and folders and what not.
Yesterday I realised that my User folder (yes I chose to store some things only on the hard drive, and not on my Icloud) informed me that it contains a 198 gb of data. Yet when I go through each of the four folders stored in my user folder, it is at the most 10gb of data.
Now, as a test, I transferred these four folders from the user folder, to an external hard drive, but the user still shows these 198 gb of data.
And to really make this a party, when I go to check my storage in settings, it does not really show these 198 gb on my hard drive, but assignes 144 gb to the Icloud drive, 21gb to applications, 19 gb for the Mac OS and some other small amounts of data.
I have already thrown out stuff, to free space of maybe, 40gb. but... it still leaves me with the Icloud drive taking up space of a 144 gb, and my User, holding firm at 198 gb, with out it showing up, either in the folders of the User, or in the storage calculations.
I do not know if I have unwillingly ended up in a silent battle of the egos (hard drive vs. cloud) or my tech abilities are just finally rejecting me as too old...
In any case I would love an explanation, and praise for a solution.
Thank you
(and sorry if my english is not up to standard, not my first language)