Best Internal Hard Disk | Internal HDD

Top 3 Best Internal Hard Disk in India | 24th Sep 2021

Reviews, Comparison and Buying Guide

internal hard disk

What is Internal Hard Disk

Internal hard disks are the primary storage of a computer or laptop that is inevitable for storing important and confidential data. Though there is a new technology emerging standard such as the cloud in the market, the difficulty for internal hard disk has never dropped. The data transfer speed and inexhaustible storage for the OS are essential in laptops for various applications used by us.

A hard disk in technical terms is a metal platter with a magnetic coating layer that stores data. It stores non-volatile data, i.e., data that are not lost after removing the power. It is stored forever unless explicitly it is erased.

It has two ports for data transfer to the motherboard and another for powering the disk. The data port uses Serial Advanced Technology Attachment (SATA) or Advanced Technology Attachment (ATA).

Difference between Internal and External Hard drive

One of the significant differences between an Internal and External Hard drive is the location. While internal hard drives need to be fitted inside your computer. Within this drive, you can store media and files. External drives need not be built-in your computers.

External drives are portable, and you have to use the right cables to connect those drives to your computer to access files such as images, audios, and videos.

To enable more protection to your data, you can use external drives. The files in the Internal disk can become corrupted and get deleted.

The internal HDD can hit a maximum speed of 125-180 MB/s while the speed of external SSD can reach up to 200-250 MB/s when used with USB 3.0.

External drives are easy to be installed on your computer. Once you connect it, your computer recognizes it automatically.

Which is better between SSD and HDD?

Well, no one can argue that SSD is considerably faster than the HDD. This is because unlike the HDD which stores data by manipulating magnetic fields created by spinning metal plates, the SSD uses flash memory similar to that of a USB flash drive which is much faster to read and write on.

The HDD, on the other hand, is considered to be more long-lasting and is without doubt, cheaper than SSD per Gigabyte. You will be surprised to learn that it might cost you more to purchase a 500GB SSD than it would if you are buying a 4TB HDD.

Best Internal Hard Disk Buying Guide : Things to consider while buying a Internal HDD

The best internal hard drives come in a variety of shapes, sizes and price. They also differ in read/write speeds and connector types. Before you click that buy button, consider these factors when deciding the one that’s best for your needs.


While buying internal hard drives, you must look at the failure rates of that particular product. The average life of internal hard drives is about 3-5 years. Try to buy a product that is more durable and lasts longer.


Internal hard drives must come with features related to the security of your data and files. It should be possible for users to set a unique password over your disk so that no one can access it without your permission.

Storage Capacity

Usually, the hunt for a new hard drive commences once we come to terms with our growing storage needs. Suddenly the 500 GB that came with your PC becomes increasingly inadequate to the task. On a desktop PC, you can simply add a second, third or fourth hard drive to the rack. Laptops, on the other hand, exercise an economy of space. The best you can do is swap out your drive for another with more storage capacity. Like executing a magic trick, you will miraculously convert 250 GB or 500 GB to 1 TB or 2TB, or more, and voila! Mission accomplished. Keep in mind though, the more storage you covet, the more money you will have to fork out for it.

Fast Operation

Different hard drives spin at different rates. The faster the speed of the system, the faster should be the spin. The higher spin modules cost more at 7,200 rpm with the top capacity of 4 TB, which costs more. To cut down the high expense, a hard disk is chosen with an average spin of 5,400 rpm in a 1 TB hard disk. HDD has a motor for spinning the disk, which defines the rpm. SDD doesn’t have spinning architecture.


The process by which the system drive communicates with the hardware has a major impact on its performance scale. Consumer disks mostly consist of Serial ATA (SATA) with a 3GBps or 6GBps.


Most of the system hard disks are of a 3.5-inch form factor, which fits easily in the bay areas. Laptops have 2.5 inches 9.5mm sized disks. Newer technologies bring thin hard disks of the size of 2.5-inch form factor, which gives a sleek look. However, the physical look doesn’t alter the performance. Before buying, make sure the size slot fits in sleek drives.

Rotational speed

Newbie shoppers might or might not realize this, but not all hard drives are born equal. Hard drives have a thing called Revolutions Per Minute (RPM). Hard drives come in 4200/5400/7200 and a whopping 10,000 RPM. Naturally the faster the RPM, the faster the hard drive will process your data. On the downside, for every extra bit of horsepower you get, cost implications factor in. On average, most hard drives you’ll find in PCs run at 5400 RPM. Manufacturers do this to cut costs while giving you what you what i.e juiced up processors, awesome graphics, e.t.c. In your search criteria online, specify which RPM category will work for you. We would recommend 7200 RPM. Frankly, 10,000 RPM is overkill unless you are a heavy user e.g a gamer. As an aside, the new SSD (Solid State Drive) and SSHD (Solid State Hybrid Drive) make RPMs look pedestrian. For a new technology that had a wobbly start a couple of years back, SSDs are now obviously the future of storage.

Cache & DRAM

With what we’ve mentioned already, a storage device’s cache is an incredibly key component. Sometimes called a buffer, a traditional hard drive’s cache serves as temporary memory. This space is similar to your computer’s RAM or the buffered zone of a streaming video. Basically, during its daily writing and reading processes, the hard drive needs an area to store the data it’s working with. Bearing that, picking a hard drive with a large cache size will be faster than that of a lower capacity.


The budget for a 1TB hard disk may vary from 3K-5K INR based on the brand, applications, etc. If you are a gamer, you can pick the drive with the highest configuration, which usually costs more.

Heating issue

Most of the drives usually heat up after hours of work. The heat is to be regulated, and the temperature handling of the disk should be good to save it from burning due to high temperatures.


RAID configuration supports more than one hard drive for smooth operation. RAID (Redundant Array of Independent Disks) supports multiple smaller units of disks to perform independently without overlapping as a single bigger hard disk.

Top 3 Best Internal Hard Disk – [Updated and Highly Recommended]

Before we see the top Internal Hard Disk from our list of recommendations, below is the broad categorization of Internal HDD which will make your shopping very easy.

Shop by Memory Size

Below are our top 3 picks of Internal Hard Disk


Seagate Barracuda 2 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 5400 RPM 256 MB Cache for Computer Desktop PC (ST2000DM005)
  • Versatile HDDs for all your PC needs bring you industry-leading excellence in personal computing
  • Advanced Power modes help save energy without sacrificing performance.Performance : Multi-Tier Caching technology
  • SATA 6Gb/s interface optimizes burst performance
  • Capacities up to 8TB for desktops, BarraCuda leads the market with the widest range of storage options available
  • For over 20 years the BarraCuda family has delivered super-reliable storage for the hard drive industry

Seagate BarraCuda 3.5-inch 2TB HDD desktop, versatile HDDs for all your PC needs bring you industry-leading excellence in personal computing.

Features / Reviews

Advanced Power modes help save energy

Industry-leading excellence in personal computing

SATA 6Gb/s interface optimizes burst performance

Capacities up to 8TB for desktops

Superior capacity


No products found.

WD purple trade; drives are built for 24/7, always-on, high-definition security systems. With a supported workload rate1 of up to 180 tb/yr and support for up to 64 cameras, wd purple trade; drives are optimized for surveillance systems. WD purple trade; surveillance storage also comes with WD rsquo;s exclusive allframe 4k trade; technology, so you can confidently create a security system tailored to the needs of your business. Using allframe 4k trade; technology, wd purple trade; drives improve ata streaming to help reduce errors, pixelation, and video interruptions that could happen in a video recorder system.

Features / Reviews

Improves video playback

Reduces frame loss

Optimises the HDD to thrive in high temperature

Optimised with AllFrame 4K technology

Surveillance storage for peace-of-mind

Consistent hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that uses magnetic storage to store and retrieve digital data using one or more rigid rapidly rotating platters coated with magnetic material.

Features / Reviews

Lower power consumption

SoftSonic motor enables whisper-quiet operation

Best-in-class environmental specifications and reliability features

160GB Capacity.7200RPM 32MB Cache


You made it through the buying guide! Hopefully you now have a better understanding of the workings and purposes of the currently-available desktop-PC internal storage devices. It’s clear that SSDs are faster than HDDs. Each serves an essential purpose in various scenarios despite the difference in performance though. For the most part, price will give you a clear indication on performance and storage. More storage and better performance will cost more—and HDDs, being the older technology, are generally more affordable than SSDs.

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