Why is the transfer rate so slow? usb 3.0 is 5 gigabits per second and usb 3.1 is 10 gigabits per second. the listed 240 mb/s is slower than usb 2.0

This drive is not slow at all - you have your megabits and megabytes confused. USB 2.0 has a max speed of 480mbps, which is 60MB/s, while USB 3.0 can push 640MB/s and this drive is 240MB/s, which is excellent for a single HDD (non-SSD, non-RAID) as most similar drives work in the 180-220MB/s range. Also please keep in mind that with any hard drive, the drive itself is usually the limiting factor in transfer speed. Meaning any single drive is typically not capable of reading/writing data at anywhere near the published max speed that the interface is "capable" of. You have to get into an SSD or multi-drive RAID setup to start really utilizing what today's faster interfaces like USB 3.0 and 3.1 are capable of.

Can you hear the fan when it's running or only when its doing a lot of work?

I do not hear a fan, but this drive is loud. Whenever it is doing something if it is on your desktop, you will hear it. It is actually loud enough it is becoming a serious distraction, and I only use the drive for Time Machine backups. If it were a drive you were accessing all the time and it was right near you, I would not be able to handle the noise. I have another LaCie 5TB drive (USB powered, no external plug) and that one is essentially silent. Why is this one so loud?

Can this be used with a 2014 iMac 27" 5K ?

The LaCie d2 Professional performs perfectly on Macs and PCs alike, you can connect it to the USB 3.0 port on the back of the iMac 5K

Is there an international warranty ? in dubai ? when we purchase this item from america.

Sorry, did not research this. It's a great external hard drive that is built like a tank. I am confident that it is going to hold up beyond any warranty period.

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🚀 Elevate your creative workflow with storage that keeps pace!

MASSIVE 4 TB CAPACITY - Store and archive your entire creative portfolio without compromise.
BLAZING 7200 RPM SPEED - Experience ultra-fast data transfers up to 240MB/s for seamless editing workflows.
PREMIUM ALUMINUM DESIGN - Sleek, durable chassis reduces noise and vibration—work quietly in style.
ENTERPRISE CLASS RELIABILITY - Equipped with BarraCuda Pro drives and backed by a 5-year warranty plus recovery service for total peace of mind.
UNIVERSAL USB C THUNDERBOLT 3 COMPATIBILITY - Plug and play with the latest laptops and desktops for effortless connectivity.

The LaCie d2 Professional 4TB external desktop hard drive combines enterprise-class BarraCuda Pro drives with USB-C and Thunderbolt 3 connectivity, delivering up to 240MB/s transfer speeds. Its sleek aluminum design minimizes noise and vibration, making it the ideal storage solution for creative professionals seeking reliable, high-capacity, and fast external storage backed by a 5-year warranty and recovery service.

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Hard Drive	4 TB Desktop
Brand	LaCie
Series	STHA4000800
Item model number	STHA4000800
Hardware Platform	Mac, PC
Item Weight	2.36 pounds
Product Dimensions	2.36 x 5.12 x 7.42 inches
Item Dimensions LxWxH	2.36 x 5.12 x 7.42 inches
Color	Black
Flash Memory Size	4
Hard Drive Interface	USB 1.1
Hard Drive Rotational Speed	7200 RPM
Manufacturer	SEAGATE
ASIN	B07G8JT7XN
Is Discontinued By Manufacturer	No
Date First Available	August 7, 2018

LaCieSTHA4000800 d2 Professional 4TB External Hard Drive Desktop HDD – USB-C USB 3.0 7200 RPM Enterprise Class Drives, 5 Year Warranty and Recovery Service (STHA4000800) Black

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