I am 100% certain that the drive inside is 5400 RPM. The 4TB is a ASIN:B013HNYV8I WD Blue WD40EZRZ 5400rpm.See my review: https://www.amazon.com/review/R388G5P0ACHROS

I did not realize this has a a/c power cord. does it require a/c power to work or will the usb power it?

I just setup my WD 10TB External Hard Drive yesterday as basically like a slave if you will and it works perfectly, lots of people will try to only connect it to the ac or some might try connecting to the 2.0 or 3.0 USP thinking more speed, the ac gives the speed better here, I have mine setup as an extra storage unit so don't want to see it near my Main hard drive in Devices, but it will set itself up a dozen times there also if you don't watch it close, so anyway I have the AC power cord plugged in that came with the External drive plus it is plugged into one of my USB slots if you will. I did have troubles with it trying to configure itself in my Windows 10 Desktop PC, and had to delete about a dozen extra bogus devices it named itself up as i.e. Ubee-DMS:10, then I formatted the 10TB storage unit, then unplugged from USB and restarted computer, then plugged back in the 10TB WD via usb into computer and PRESTO all worked as it was suppose to via the USB cables as a storage unit. When I Formatted the 10-TB WD AND IN DOING SO it Showed me it only had a capacity of 9.09TB and not the 10TB as the description showed I paid for, BUT 9TB or even 8TB would be just fine for me anyway.........

my house has 210-240v european sockets , will this fit with normal adapter or will it burn out because it from america?

The Drives AFAIK are comfortable with 110v-240v. Im in Australia (240v) and seems to work fine. If you are concerned drop-in replacement adapters which have standard euro sockets (search mycartmax ebay) are about $8-10US, I would recommend a correct plug adapter anyway to avoid cheap international adapters. The price cannot be beaten (I study cryptography so go through a lot of drives) even adding in the cost of a replacement adapter the drive is a good buy.

ok, stupid question, if i unplug the power cord with my data still be saved?

I think you are worried if you unplug the power cord is your data on the hard drive going to disappear permanently when you plug the power cord back? If this is what you meant to ask yes the data will still be there if you saved the data and properly waited for it to write the data to the hard drive before unplugging the USB and power brick cable. Do not turn off the power until either the data has been written or at least a minute has passed since any activity to the drive if you're really concerned. The safest is to eject the USB drive from Windows and wait for it to say it is safe to unplug the device. But since you can usually see the light flashing when it is reading or writing this will usually indicate it is safe to unplug.

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A**9

Good item bad delivery 📦

Items is perfect but I didn’t try it because the delivery 🚚 man left it outside the house I don’t I will find it or no

5.09.2025

M**.

Great drive

I bought one and set it up as a network drive. Worked great. Decently quick transfer speeds too.

17.07.2021

J**.

Works as expected

21.01.2021

M**A

بيعمل صوت عالي اثناء التشغيل

25.01.2023

W**A

very good

V good

2.11.2023

D**Z

Bad HD

Not working now after transferring my file , im gonna return this item, my mac cannot read this drive anymore, its so frustrating and disappointing. Wont recommend. Second time im having an issue with WD

27.12.2025

K**P

Original WD 4TB

Good quality original product. Perfect fit for my need.

10.10.2022

H**D

ممتاز

25.06.2022

O**Z

Tube un poco de problemas en la compra pero esto fue debido al banco, ya que arregle la situación gerere la compra y me llegó el producto al soguiente dia no me lo esperaba la verdad faltaban dos dias para que me llegara y me llego, el disco es una maravilla no hace ningún ruido y su escritura es rápida estoy encantado con este artículo y el precio es sorprendente compraria otro sin duda.

23.04.2018

N**A

I checked reviews. I had doubts about this product. It arrived cleanly without issues; software worked well; I configured Raid 1 and it is working properly as of now. Will update the review after using it for sometime. Ps. I am not using it 24x7. So, take my review with a pinch of salt, in case you want one for a 24x7 usage.

4.03.2021

C**J

I'm a complete idiot when it comes to teckie things but it was so easy to install and set up. For the money I would highly recommend

23.05.2025

J**L

Gutes Speichermedium. Nach meiner bisherigen Erfahrung sind die WD My Book Desktop Externe Festplatte, 1 TB und 2 TB sehr robust und langlebig. Ich gehe davon aus, das auch die 6 TB die selbe hohe Qualität besitzt.

23.10.2023

A**Z

Ok.

12.04.2024

ASIN	B01LQQHL4E
Are Batteries Included	No
Best Sellers Rank	#679 in Computers ( See Top 100 in Computers ) #7 in External Hard Drives
Brand	WD
Color	black
Customer Reviews	4.4 4.4 out of 5 stars (12,481)
Date First Available	11 October 2016
Form Factor	3.5-inch
Hard Disk Description	Mechanical Hard Disk
Hard Drive Interface	USB 3.0
Hard Drive Size	4 TB
Hardware Platform	PC;Mac
Item Weight	168 g
Item model number	WDBBGB0040HBK-NESN
Lithium Battery Energy Content	3600 Watt Hours
Lithium Battery Packaging	Batteries contained in equipment
Lithium Battery Weight	4 Grams
Manufacturer	Western Digital Technologies, Inc.
Number Of Lithium Ion Cells	4
Number of USB 2.0 Ports	1
Number of USB 3.0 Ports	1
Operating System	Windows 10, Windows 8, Windows 7, Mac OS X El Capitan, Yosemite or Mavericks
Product Dimensions	8.79 x 21.59 x 17.02 cm; 167.83 g
RAM Size	4 TB
Series	My Book

Western Digital 4 TB USB 3 My Book Desktop External Hard Drive - WDBBGB0040HBK-NESN

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