After about 11 hours, I only have 51% of 595 GB backed up to a 2 TB hard drive using a USB 3.0 port on Windows 10 machine. Tech disabled sleep and display turn off.
Does this seem excessively slow? Is it defective?
Sounds pretty slow to me 
… all of my WD Portable drives (Elements and Passports)
transfer rate is anywhere between 70MB/s to 100MB/s on USB3.0… mostly large files, small files (and a LOT of them) the speed does drop, but not too much.
Short Story: I bought a 2TB Elements Portable last week … first thing i always do is format new hard drives from “fresh” in this case i needed to format the factory format from NTFS to exFAT … anyways, after that, transfer speeds were as above (70~100MB/s)
Recommended to a friend to buy one (because they were cheap/on sale) … he then brought it to my house, i plugged it in, bu,t i did not format the drive for him … and i just started copying files for him.
Was shocked at how SLOW it was ! was getting between 10MB/s to 20MB/s ! … checked cables, tried different USB3.0 ports … no difference.
It was then, i said to him, i’ll have to re-format the drive as something strange is happening. Anyways, deleted the Partition Table and reformatted the drive to NTFS for him. After that … Speed was what i expected it to be ie. between 70MB/s to 100MB/s.
My advice,
Try using the drive on a different computer, or try a different USB3.0 cable or USB3.0 port
If no difference, then if you have a backup of your files/data
completely re-partition and re-format the drive (i use 3rd Party Software)
If it’s still snails pace slow after all of that, then dunno, sounds like it could be defective.
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Thanks so much for the great feedback. I deeply appreciate it. I contacted WD support since it is brand new, but will add in your advice. Yes, something doesn’t seem correct.
