Memory Cards: Stories of Technology, Science, and My Experience.
Today I will talk about a small but incredibly important thing, a memory card. When I first picked up this small, thin plastic thing, I could not understand how much knowledge, technology and science is hidden inside it. Today, after all this time, when I take pictures, make videos, listen to music, transfer files on my mobile, I see its contribution in everything.
A memory card is a type of non-volatile storage device, which means that it can store information without electricity. That is, once you write something, it will remain even if there is no current. Inside the memory card there is a flash memory chip, which is mainly used to store information. Along with this, there is a controller that controls the entire process of how data is stored and read.
We see many types of memory cards, such as:
SD (Secure Digital) card microSD card (most commonly used in smartphones)
CF (CompactFlash) card Memory Stick (made by Sony)
MicroSD cards are further divided into different categories:
SDHC (High Capacity) – from 4GB to 32GB
SDXC (eXtended Capacity) – more than 32GB
SDUC (Ultra Capacity) – can go up to 2TB!
Each card has its own speed – such as Class 10, UHS-I, UHS-II, etc. This means how fast you can write or read files.
Image source
Many people wonder, how can so much be packed into such a small thing? This is actually a remarkable example of semiconductor physics and nanotechnology. The flash memory used in memory cards is made using Floating-Gate Transistors. These transistors change the position of electrons and store 0 or 1, which is our binary data.
A memory chip has millions of transistors arranged very densely, almost nanometers apart. This is what stores all our pictures, videos, and songs. This whole thing is operated through CMOS (Complementary Metal–Oxide–Semiconductor) technology.
When we were young, film was used in cameras. Then came floppy disks, then CD/DVDs, then USB pen drives. Now we have come to the era of memory cards. Today, a small memory card can store 512GB or 1TB of data, which is equal to 20-30 old DVDs! And this card weighs only a few grams!
My first memory card was 2GB. At that time, I used it in an old Siemens phone. I used to listen to music, share photos with friends. The phone would become slow, but that memory card opened up a world.
Once during an exam, the phone's memory card suddenly got formatted. All the notes, audio lectures, PDFs disappeared! I learned how important it is to have a backup. Since then, I regularly copy the memory card information to my computer. Now I have a 128GB microSD card in my phone, which I use for video editing, mobile photography, document scanning, and everything else. Once, I needed to send some files in an emergency at an office and there was no internet, so the memory card was my only hope.
Although the memory card is small, it contains a lot of personal information. So, some things should always be taken care of:
1. Regular backup: Data can be lost at any time.
2. Do not open it incorrectly: If you open it suddenly during file transfer, the card can be damaged.
3. Format carefully: If you format it accidentally, you can't get anything back.
4. Avoid fake brands: There are many fake memory cards in the market, which say 128GB but actually have 8GB.
In the future, the speed and capacity of memory cards will increase further. Currently, 3D NAND Flash technology is being used, which can store data in multiple layers. This has increased both speed and durability. AI-based storage optimization is also expected to bring a big change in the field of memory cards in the future.
There was a time when large hard disks were needed to store a single piece of information. Now, we store movies, documents, memories, and even our life stories in a card priced at 100 taka. Memory cards are not just a device, they are a part of my life. Through them, I save memories, share learning, and multiply my work. I am really fascinated when I think about this small miracle of technology.
.
I have gathered information about this memory card from my own experience and I had watched some videos on YouTube before, and with some experience from here and other platforms, I had a lot of ideas about this memory card before, so I was able to share them with you. Thank you
How was your experience with memory cards? You can tell me in the comments below, I am interested to hear. 😊
This is an eye opener. I never knew about the varied kind of memory cards and how fake ones trend even in the market. Please sir I help, how would I identify the fake from the real ones? Especially the capacity of the cards????
First of all, if the price is high or low, check it, it is most suspicious. Get it tested with H2testw and if the speed is very low, it means it is fake. And you should not buy it without a branded or official seller.
Wow, this is a great information which you have share... Funny enough many of us uses all these card but some Might not know this deep...
Thank for sharing this tips and information about memory card...