Hi again !!
Thanks a lot for your answer but I had photos of a lifetime in there so your answer didn’t help me that much. Thanks though.
Anyway I have solved the problem.
I went to System Preferences then I clicked on Startup Disk. There I have found that the disk was locked and there was an UNLOCK button so I clicked on it, tapped a password I use for almost everything and there It goes.
PROBLEM SOLVED !!
Thanks again for trying.
