External or portable hard disks are essentially used only when the PC’s HDD is full, but some of the much-needed special data needs to be backed up separately. There was a time when users could easily find a solution with 4 GB or 6 GB storage. But keeping pace with the change in time and type of work, external hard-disk is now considered as a part of the special needs of the customers. (External hard disk buying guide)

Cloud storage is great for storing data but online backups are never enough if you need to store a lot of data later. Again, if broadband access is blocked or slow internet, local storage is the only hope.

And these are the reasons for the origin of portable storage. From editing home videos to storing lots of family photos, collecting music, and even backing up your most urgent needs in this local storage. And so local storage is always better than a cloud in terms of performance and availability.

Here is a guide for users with high capacity storage (multi-terabyte hard-disk and multi-gigabyte flash) outside of the USB stick and SD card. All USB and Thunderbolt drives are small in size, high in capacity, cheap, and fast. And one of the advantages of these devices is that they are ‘bus-powered’, meaning that the power of these devices comes from the host computer. It does not require a separate power adapter except for the data cable.

Dong Ngo, tech editor of the Senate website, recommends four things to consider before buying a portable drive. Below is the list:

Select the correct connection:

Speaking of connectivity here is the USB  vs Thunderbolt connection. Although the Thunderbolt connection is largely obsolete. As you connect your drive to your computer, it is important to know what type of connection your computer supports. And so if the computer supports Thunderbolt or Thunderbolt 2 port (pre-2016 is quite popular on Mac computer) then you need to choose Thunderbolt drive. However, most computers have a regular USB port. So before buying a drive, you should consider the future connection trends. (External hard disk buying guide)

Stay up to date with current trends:

The current trend is the USB Type-C (USB-C) connection. This new connection type supports the latest USB gadgets and all Thunderbolt 3 devices. In other words, all Thunderbolt 3 ports are USB-C ports. Good to know, a USB-C portable drive, both a USB-C port and a regular USB port will work. But a non-USB-C portable drive will not work on the USB-C port unless you use a separate adapter. So if you buy a USB-C portable drive it will work on all computers. And so you don’t have to worry about your drive even if you buy a new version of the computer.

Make sure the drive is fast enough:

Keep your needs in mind first. If you just want to watch a movie or keep a data backup, buy a hard-drive-based portable drive (non-SSD). This will save you money. But if you want to do heavy work like editing HD movie files or transfer heavy data files in a short time then you have to buy a solid-state drive-based portable drive. Although this drive is expensive.

How much storage device to buy:

Storage capacity is the biggest concern. Rather than buying more storage devices at a much higher price, buy as many storage drives as you need for your work.

What is an external hard-disk?

The external HDD is just like a normal hard drive, which the customer can use as a portable hard drive from anywhere. There are two main types of external hard drives popular in the computing sector – HDD and SSD, also known as solid-state drives. The difference is that the portable hard drive can be supplied with the required power with a data cable, so there is no problem with other power supplies separately. However, you can also use it as an internal hard-drive through the enclosure. USB 2.0 or 3.0 or Type C connector cable is now available for external hard-drives, you can still enjoy the benefits of SATA and FireWire or wireless cable.

Why use an external hard drive disk?

In our daily lives, we store various data, files, and pictures on our personal computers at work or outside of work. You probably don’t want to admit that you lost that data when your PC or hard-disk crashed. So the use of an external HDD can be one of the reasons for your relief in case of emergency data backup. A portable HDD can play a safe role for you in carrying or storing movies, music, or any big data. And for laptop users, using an external hard-drive is a much easier matter. The biggest advantage, in this case, is that it will be possible to access a device and drive connected to any local network by combining a network storage device with an external HDD. (External hard disk buying guide)

Things to do before buying a portable hard disk :

Data speed:

A good quality hard-disk is just as important to get a good experience in data storage, data speed of the external hard drive is also one of the main issues. You can use SATA cable or USB 3.0 and C-type cable to ensure fast speed. But the speed of data transfer also largely depends on the HDD. RPM in particular plays a special role in this. Note that the higher the RPM, the higher the data speed.

Network system:

Network Attached Storage (NAS) or RAID may be the easiest solution for you if you want to store more data simultaneously on a wireless network system. The advantage of the RAID system is that it is possible to use multiple drives simultaneously.


The size of the hard drive depends on your data backup needs. You will get HDD drives of different sizes from 250 GB to 1 terabyte online. In the case of large file storage, a little more space can give you extra benefits.


Both HSD and SSD hard_disks are able to meet your storage needs quite well. However, you can bet on solid-state drives to get the fastest access to large files and data. You can keep an eye on SSDs to get a taste of huge capacity and ultra-fast speed external hard drives at low prices.

External hard_drives of other popular brands including Adata, Transcend, Samsung, Toshiba and Apache are now available in local shops as well as local marketplaces in the country.