I do not want to give any stars at all. This storage HDD failed just after one year.All my research data and search data everything lost.I used all available software tools (including commercial recovery tools) to revive the HDD. Stored at -80C for couple days (while securely sealing high quality plastic pouches as a last resort). None worked.Still I have this unit with the hope that someday I might have hands-on hardware tools to open HDD to recover files from each plate.REMEMBER: HDD recover costs are too steep (at least $2000). Also, if the HDD falls under wrong repair person's hand your data lost forever.