I would be frustrated too and I hope some of the above hints help you out. My son has told me for years that Seagate EHD's are pieces of crap and not to ever, ever, ever waste your money on them. I bought one and had lots of issues with it, not nearly to the extent as you are having, and that is when he told me they are crap. So sorry! Can you return it and get a Western Digital or another brand and try that?

Good luck!!