External Hard Rive Hard Rive..external..right! Had Issues With Write Errors Etc?

Hard rive..external..right! Had issues with write errors etc? - external hard rive

He has all the information from him now possible problems. No mechanical problems that can hear. You can format with quick format and it is ok, but I tried to copy the data into it and have had an error of about 3 / 4 of the way and stopped. He tried a full format and not exhaustive. He tried a few pieces of software, and remains ... an idea that is working well, if I seem to fill it 3 / 4! Not quite ready to be used as a paperweight, but .. Does anyone know any good program or had the same problem? Thanks in advance