Macbook Pro Won't Turn On/Can't Backup Files
Hello!
So I've been experiencing a noticeable slowness/freezing in my Macbook Pro for the past few months and sometimes a very loud fan noises so I thought it might be due to low memory (I had about 130GB of free space out of the 500GB) so I've been trying to move my files to an external hard drive and though I transferred quite a few of my important files I couldn't transfer the majority of the files in different folders, especially if I tried to move 50+ files at once it would become very unresponsive and the only way to stop the process is if I restart my laptop, but the serious problem occurred yesterday it suddenly started making those loud fan noises again and then it froze and the screen turned completely black so I had no choice but to shut it down by holding down the power button, after a few minutes I tried to turn it on and I heard the starting chime but then it was stuck on the gray page with the apple logo, so I tried to boot it in safe boot and it worked but when I restarted it normally again (without holding shift) it was stuck on the gray page again. I tried this several times afterwards but to no avail unfortunately.
I searched up online for users who faced the same issue and found that the first thing I need to do is backup my files which I tried to do in safe boot using the disk utility but it would give me an "Input/Output Error" message, I also tried to manually move my files to my external hard drive but it does not show up in the finder only in the disk utility (I've tried different external hard drives and none of them showed up in the finder), I read somewhere that I could connect my Macbook Pro to another mac using a firewire cable and transfer the files I need but I don't have another mac nor anyone I know so could it work with a windows laptop ? if not what can I do to backup my files at this point ?
Any advises or suggestions are very appreciated! thank you in advance!
MacBook Pro, Mac OS X (10.7.5), 13-inch, Mid 2012