BleepingComputer.com: brand new 3tb hdd fitness and performance down to 80%

At this point if Seatools for Windows does not run. Seatools for DOS can't do USB externals of course.

I would get in touch with Seagate tech support.
http://www.seagate.com/www/en-us/about/contact_us/
There are links for online chat and phone numbers.

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And ask why Seatools isn't working and bring up the Ashampoo results and you concerns about the temperatures.

Since losing things worries you a dual pronged approach would be best,

1. A Backup external drive with mirrored drives to have them available easily.
2. Backup files to a Burner onto good quality blank media. I am now using Verbatim BluRay 25Gb blanks with a Pioneer BluRay burner.

The main reason why the above is better is that a virus can damage files on a attached drive or you do an oops to it. Includes knocking it over when it is running. A burned disc can't become damaged by a virus or accidental deletion. Poor quality media can deteriorate. I have some cheap CDs I burner that are unreadable. Lesson learned I now use a good brand.

These are what I use "Verbatim 25GB 6X BD-R 25 Packs Spindle Disc Model 97457"
http://www.newegg.com/Product/Product.aspx?Item=N82E16817130156
I avoid the LTH and stick to the HTL media BTW.

The reason I suggested BluRay was it uses less shelf space.

Good Luck
Roger

What drive is it:

http://www.seagate.com/www/en-us/products/product_finder/?sourcePage=0