My new Seagate ST3500418AS does not work. Can make patition, can format it (very slow, this takes more than 6 hours). But cannot copy files onto it. When copying, an error is reported and then the disk disappears from the computer drive list! Do I need to return this Seagate hard drive?
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RMA the drive.
Unless you are certain you are doing everything right, could be worth a call to their support and see if you're missing something obvious.