DIGIT-ARC read-only archive · snapshot: July 23, 2026

External HDD Which one 3.5" or 2.5" ?

13 posts · originally from https://geek.digit.in/community/threads/external-hdd-which-one-3-5-or-2-5.147719/

User Name
User Name Original post #1
Oct 18, 2011 at 12:34 PM
hi

I am going to buy an external HDD 1 TB USB 3.0 with backward compatibility.

My friend suggested that if you are buying 1 TB you must go for 3.5" i.e with external power supply. In 2.5" 1 TB your data may get corrupted as it is without external power supply. :sad:

But i want to buy 2.5" because of it's portability and you don't have to carry power supply cable.

Which one should i go for? :?

Also which is best buy WD or seagate? :?
Gaurav Bhattacharjee
Oct 18, 2011 at 12:50 PM
Both Seagate and WD are the best buys as of now. Defiinitely go for the 2.5" one if you want portability. My friend has two 2.5" Seagate FreeAgent HDDs and they work just fine.

Seagate Expansion Portable 2.5 Inch 1 TB External Hard Disk (Black) @4100 (Cash on Delivery)

WD Elements SE 2.5 Inch 1 TB External Hard Disk (Black) @4099 (Cash on Delivery)

The above two don't require external power.

But if you want to buy a 3.5" HDD, get the one below. I think it needs external power.
Western Digital 3.5" 1TB Essential USB Desktop Drive @3450
User Name
Oct 18, 2011 at 1:07 PM
thanx for reply.
Is there any prob of power or data corruption in 2.5" without external power supply HDD?

Also both the above HDD support USB 3.0?
Gaurav Bhattacharjee
Oct 18, 2011 at 1:10 PM
thanx for reply.
Is there any prob of power or data corruption in 2.5" without external power supply HDD?

I don't think there should be any problem if you handle it judiciously. My friend hasn't had any trouble in the past 4 years of usage so there's nothing to worry about.

Also both the above HDD support USB 3.0?

No USB 3.0 support for the 2.5" HDDs.
But the 3.5" one does have USB 3.0. Take your pick.
R
Oct 18, 2011 at 1:41 PM
thanx for reply.
Is there any prob of power or data corruption in 2.5" without external power supply HDD?

Also both the above HDD support USB 3.0?

About your first question, 2.5" drives are nothing but those which are used in laptops. They just put a SATA->USB connector and sell it like hotcakes. In simple words, data won't get corrupted unless you do something silly. Power is not a problem, 2.5" can be easily powered through USB. 3.5" on the other hands spins at a higher rate + requires more power = External Power Source.
tkin
tkin #6
Oct 18, 2011 at 2:08 PM
hi

I am going to buy an external HDD 1 TB USB 3.0 with backward compatibility.

My friend suggested that if you are buying 1 TB you must go for 3.5" i.e with external power supply. In 2.5" 1 TB your data may get corrupted as it is without external power supply. :sad:

But i want to buy 2.5" because of it's portability and you don't have to carry power supply cable.

Which one should i go for? :?

Also which is best buy WD or seagate? :?
ROFL, made my day, 3.5" powered drives are cheaper, but they lack portability, get 2.5" drives if you want portability.
pratik385
Oct 18, 2011 at 2:29 PM
dude
you can get 2 TB Seagate Freeagent goflex desk 3.5" @ 4.7k
if you have one 2.5 then opt for 3.5 with massive storage, you can use 2.5 one for portablity :)
User Name
Oct 18, 2011 at 3:06 PM
Well i have 40 GB 2.5" external HDD (bought long time back).

now i want more storage space hence considering for 1 TB 2.5".
User Name
Oct 23, 2011 at 9:53 PM
I just seen that prices of HDD increased. Will it good to buy right now?
Should i wait?


Flood Waters in Thailand Deepen Crisis at HDD Companies - Forbes
d6bmg
d6bmg #10
Oct 23, 2011 at 10:24 PM
If possible, then yes, wait for some days and hopefully they will come down again inside 2-3 months.
User Name
User Name #11
Oct 24, 2011 at 10:36 AM
I can't wait for 2 months......
dashing.sujay
Oct 24, 2011 at 3:12 PM
Gaurav Bhattacharjee;1511401 [B said:
No USB 3.0 support for the 2.5" HDDs.[/B]
But the 3.5" one does have USB 3.0. Take your pick.

:crazy: Where have you read that man?
d6bmg
d6bmg #13
Oct 24, 2011 at 3:35 PM
^^ He is talking about the two models posted by Gaurav Bhattacharjee.

P.S. As all of us know it already, price have been increased.