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disk stops working after a while. It is mounted and after 1 min, it sounds and stops working. the system and the disk utility sees it, but can not do anything with it, not even unmount. I’ve tried tech tools and disk utility but they can accomplish the tasks because the disk cannot be unmounted and stop working after 1 min. help please !! what can i do? i ve called some companies for data recovery but they are Really expensive…….. its like i can buy 7 new disks …… Actualización (31/10/16)

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Hello. Well the disk now simply just doesnt work, when i connect the disk it sounds immediately, i think its hardware disk failure. Before stops working the disk worked fine for 1 min. because of that i was able to try repair softwares and try to backup what i could also. And off course i tried diferent cables and computers, but nothing worked. I will upload a video to better explain the malfunction. Thaks for reply !!!