my time machine stopped working recently. the last successful back up was 10/26. everyday i repeatedly get that the back up failed (sorry i forget the exact error message) sometimes if i dig a little deeper it tells me i dont have enough space on my backup drive and gives me some crazy number as what is left for space but i know it's not true. it has like 300 gbs free. i believe the root of this issue is my husband bought me a new bigger hard drive for my macbook and swapped the old one out. now the hard drive name is different. i cant find a place to reroute the time machine back tothe new hard drive. also when i try and go into time machine and change certain things it asks me for my password but it says my regular password for everything else on my mac (like software updates) is wrong but gives me no "forgot password" option. ive tried every password ive ever used. something crazy is going on and i dont know what! please help! thank you!