How do I extract data from a broken android OS? (Samsung Galaxy S6)

Hi guys, I have a big problem. A couple of days ago I shut down my phone and then when I started it again, it went stuck on the Samsung Logo. I know there was a pending system update but I said to wait to install it. I was able to delete the cache, but to no avail. So I tried to download the data to my PC because I really didn't want to lose my photos and contacts because of a system reset. I used Dr.Fone toolkit and Easus MobiSaver but the trial version of the first appears really buggy to me and crashes/hangs in many occasions (so I'm not going to pay to get out of trial), the second can't even connect to the phone via usb. Can you please suggest some other software or data extraction/debbugging tool?

thanks