Mine failed last week after working since around 2014. It didn't give me any alerts except that it was unable to make backups. Trying to format the thing comple

Mine failed last week after working since around 2014. It didn't give me any alerts except that it was unable to make backups. Trying to format the thing completely wasn't fixing it either. Ended up following an iFixit tutorial to replace the HD with a 1 TB SSD and now it works fine again.