Which hard drive to buy based on features, price and type; Things to know before buying the computer disk
The hard disk is always a key component of computers, since it is its fixed memory, the one that stores data even if the computer is turned off for a long time.
You can buy a hard disk either to replace an old hard disk or to have an additional backup hard disk, to increase the startup performance of the operating system or programs or to increase the space in which to save photos and files.
Since the hard disk is generally the slowest component of a computer, changing hard disk on a PC a few years ago can really make a difference in its performance, especially if we focus on the latest technologies (SSD).
When choosing a new disk or “hard drive”, it is important to keep certain in mind important factors that distinguish the various models from each other and consider any problems in the substitution.
Buying a new hard disk today is really easy.
Whereas before it was necessary to go to a specialized computer shop where it was also easy to be fooled, today it is enough to go to the Amazon site, where the choice is really wide and it is also easy to make mistakes.
In the following points we see things to consider before buying the PC hard disk …
1) Hard Disk or SSD
First you need to understand if you want a hard drive or solid state drive SSD.
Technically, the hard disk is a mechanically spinning disk and a head that reads it while the SSD is a flash memory chip, like a USB stick, from which data is read and written.
An SSD is fast, much faster than the normal hard disk and is also more shock-resistant and less expensive than energy, but it costs even more for the same space available.
If you want a very spacious disk then it is better to choose a hard disk while if you want to replace the primary disk of the computer is definitely better a faster SSD.
If the price is not a problem, then it is always worth choosing the SSD and consider hard drives only as secondary disks where to save the most voluminous data to keep (since the SSDs still have a reduced capacity).
2) Size and Type
Once decided between an HDD and SSD, you must choose the size and type.
Fortunately, the types of computer disks are only two, a large 3.5-inch and 2.5-inch drive.
Traditional hard drives are usually 3.5 inches large with a maximum capacity of 4TB, while portable disks tend to be 2.5 inches with a maximum capacity of 2 TB.
SSDs may be smaller because they do not have moving parts, usually 2.5 inches.
In reality, however, the size matters only if you are forced to use a small 2.5 disk, otherwise, you can always mount an SSD in a 3.5-inch connector with the adapter that you can always find on Amazon.
As for connections, most disk drives – both hard drives and SSDs, use SATA connectors.
If you purchase an external drive, it will connect a USB port.
3) Specifications and Performance
The main specification of a hard disk is, of course, the space.
The HDDs are larger, at the same price, compared to the SSD as already explained in point one.
In general, a hard disk can be up to 4 TB maximum while a maximum SSD one TB.
As with any part of the computer, the disk may also be different, model-to-model, depending on performance.
In particular, for hard disks, we need to look at the speed of rotation that affects the speed of data transfer, reading and writing
The speed of a disk is measured in revolutions per minute (RPM) and the higher it is, the faster it is.
Another value to consider when deciding whether one hard drive is better than another is the cache space, a memory similar to RAM where data is temporarily stored before being transferred from one section to another.
A larger cache allows you to transfer data faster.
Modern HDDs can have cache sizes ranging from 8 MB to 128 MB.
SSDs, on the other hand, have a high sequential read and write speed that can only be limited by an old SATA socket on the motherboard.
With regard to durability and strength, as HDDs are mechanical, they wear out over time.
Not all HDDs are the same, however, with some models that can break within 6 months, while others with a duration of 6 years.
Modern SDDs tend to last longer (on average 2 million hours) than modern HDDs (average default rate of 1.5 million hours), however, for long-term data retention when kept unplugged, a HDD disk is much more reliable than an SSD.
5) External or Internal
An external hard drive is convenient for attaching it to your TV and for transferring your data to the back of your home, office or on the road.
The outdoor units are also perfect for backing up important data.
External disks are slower in data transfer rates than internal disks unless you have USB 3.0 support, which significantly increases the read and write speed by bringing it close to the values achievable with a SATA port.
To clarify, any data unit can be used internally or externally if it has compatible connectors.
When used externally, the disk is simply enclosed in a protective envelope so if an external disk can always remove the envelope and use it internally.