I use to have this external HDD as my backup drive and it was working fine till last week now all of sudden I am facing this problem. When I try to access it from the disk utility, it gives the error message as “First aid failed, Filesystem verify or repair failed”. What is the problem with the HD now? It’s pretty new too which shouldn't be having hardware problem either. Can you please give me the solution for this? Many important files are there in it.