Description of SD-Card
SD Card- To store all the data we need some storage medium which we storage device it is said. By the way, there are many types of storage devices like Floppy Disk Drive, Hard Disk Drive, Optical Disk Drive, Pen Driveand SD Card etc. And on this page you will understand the information of SD Card by reading it in detail.
what is sd card
The full name of SD card is Secure Digital Card. It is a data store electronic storage device Is. It is also called as memory card in common language.
It is an Ultra Small Size Storage Device which is designed to provide small high capacity memory.
Despite being small in size, a large amount of data can be stored in it. It is specially designed for portable devices. this one Non Volatile Memory Card is.
When was memory card invented
In the year 1990, the SD card was created, which was probably the first memory card. In the 1990s, many other memory cards smaller in size than SD cards also came. In which were Compact Flash, Smart media and Mini-card.
From the 1990s to the 2000s, many new types of memory cards were introduced. In which cards like memory stick, XD Picture were the main ones. Current computers and mobile phones have slots for memory cards. Some devices can also use more than one memory card.
how memory card works
Data is stored as a digital format on the SD card. Inside the plastic cover of the card, there are many small electrical circuits in the solid state chip.
When the card is not in use, the circuits retain their charge without any additional power. When a card is placed in an active device such as a camera or cell phone, a small electric current from the device transfers electrons to the flash memory chip.
The digital patterns stored in the chip are related to the data stored there. Write and erase SD card memory in blocks or sections.
memory card types
Memory cards are divided into different parts based on their physical size, storage capacity and speed.
Physical Shape
SD cards are of three types based on their physical size.
1. Standard
Standard SD cards are the largest in physical size although they are smaller than other memory cards. They measure 32×24×2.1 mm and weigh just 2 grams.
It is used in digital cameras. Its storage capacity ranges from 128mb to 4GB.
2. Mini
Mini SD Card was released in 2003. It is smaller than the standard SD card. They measure 21.5×20×1.4 mm and weigh about 0.8 grams.
It can be used for different types of files, music, videos and Software is used to store.
3. Micro
Micro SD card was released in 2005, it is the smallest SD card. It measures 11×15×1 mm and weighs about half a gram.
Their size is about the size of a nail. It is also used to store data. It was specifically designed for mobile phones.
Storage Capacity
There are different types of memory cards based on their storage capacity.
1. SDSC Memory Card
The full name of SDSC is Secure Digital Standard Capacity. It is the basic form of a memory card, it measures 32×24×2.1 mm and weighs just 2 grams. Its storage capacity ranges from 128Mb to 4GB.
2. SDHC Memory Card
The full name of SDHC is Secure Digital High Capacity. This type of memory card has more storage capacity than a normal memory card. Which ranges from 4GB to 32GB.
3. SDXC Memory Card
The full name of SDXC is Secure Digital Extended Capacity. Its storage capacity is more than SDSC and SDHC. Which starts at 64GB and can go up to 2TB.
4. SDUC Memory Card
The full name of SDUC is Secure Digital Ultra Capacity. This is a new SDCard that was announced in 2018. Its storage capacity ranges from 2TB to 128TB.
Bus speed
Different SD cards have different data transfer speeds. Bus speed This will affect how quickly you can receive the data in post production.
To find out the speed of the SD card, their class is given on them. It shows their speed that what is the speed of your card. Speed here means how fast your card reads or writes data.
- Class 2 SD Card :- In this card you can transfer data at the speed of 2 MB / S, it is a very slow speed card.
- Class 4 SD Card :- Its data transfer speed is 4 MB / s.
- Class 6 SD Card :- Its data transfer speed is 6 MB / s. You can also do HD video recording in this card.
- Class 10 SD Card :- Its data transfer speed is 10 MB/s. You can also do High HD Video Recording in this card.
- The full name of UHS-I is Ultra High Speed I and it is the speed class for SDHC and SDXC memory cards. Its BUS interface speed is up to 104 MB/S. These cards offer slow speeds but are very cheap to buy.
- The full name of UHS-II is Ultra High Speed II. The card offers fast read and write speeds and is designed for videographers who need to write and back up data in a large capacity. It has a maximum BUS speed of 312 MB/s.
- The full name of UHS-III is Ultra High Speed III. It was introduced in 2017 with a maximum speed of 624 MB/s.
When the capacity of the memory card or its class is high, then their price is also high, so whenever you go to buy your card, buy the card according to your need, how much data transfer speed you want the card.
Benefits of memory cards
1. Increase in Storage
The first advantage of any storage device is that you can easily get the increased storage. Smartphones always come with limited storage space.
In which you are not able to store large amount of data, then you can increase the storage capacity of your smartphone by using SD card.
2. Low Price
When you take a mobile with less storage then you are short of storage. You are not able to take a mobile with more storage because it is more expensive, so you can use SD card according to your budget, which is cheaper for you.
3. Reduce phone memory consumption
After adding the SD card to the phone, you can transfer the rest of the files like movies or music etc. from the phone memory to the SD card.
Also, many phones allow apps to be installed in the card. In this way you can reduce the consumption of internal memory of the phone.
4. Portable
SD card is more portable due to smaller size. So it is easy to take it out from the smart phone, fit it in another device or carry it somewhere else.
5. Low power consumption
Memory cards require very little power. Using this will not waste much power on your smartphone.
6. Easily accessible on PC.
It is very easy to access SD card on computer. You take the card reader first. Then insert the card into the reader and the reader PC Of USB Port Plug in.
7. Non Volatile Memory Card
The memory card uses a non-volatile memory card which can keep the data on the card static. There is no danger to the memory card data due to power outage.
memory card disadvantages
- Like other storage media, memory cards can break easily.
- There are different brands of memory cards. If you buy a cheap SD card and use it on a smartphone, then your phone may get damaged. For example, this causes apps to run very slowly.
- Memory card provides more storage for less cost. Still, its speed cannot be equal to the internal memory of the phone. Therefore, the SD card can be a bit slow while accessing the data.
Can we plug Micro SD card into the slot of standard SD card?
SD cards only fit in the matching slot.
You cannot plug a Micro SD card into the slot of a standard SD card. However you can buy adapters that allow you to plug in a smaller memory card as a larger memory card and fit it into the slot.
What should I do to transfer data from memory card to computer?
If your computer is equipped with a memory card, then you can transfer data by inserting an SD memory card, but if your computer does not have an SD slot, then you can use USB Read / Write or a computer adapter.
Hope you liked the information about memory card.
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