Memory Cards are various electronic flash data storage devices applied for saving digital information.

A memory card is a type of storage device that is used for storing media and data files. Memory cards are usually used in small, portable devices, such as USB Drive, SD card and phones etc. A memory card is also known as a flash card. Below are six use of memory cards:

  1. Used on digital cameras to store photos.
  2. Used on mobile phones to store music, files and movie videos.
  3. Used on DV (digital camera) to store video.
  4. Used in GPS to store data.
  5. Used for industrial control to store program software, etc.
  6. Used in MP3, MP4, digital recorder, etc.

Memory Cards are various electronic flash data storage devices applied for saving digital information. Memory card is compact, portable and easy to use. In the meanwhile, since most memory cards have good compatibility, data can be exchanged between different digital products. In recent years, with the development of digital products, storage capacity of memory cards has been continuously improved, and the application has been widely spread.

Below are Card family and other details:

Card family Standards organizations Varieties Entry date Maximum commercially available capacity
CompactFlash SanDisk I 1994 512 GB (CF5128*250 bytes)
CFexpress CompactFlash Association 1.0 2017 1TB
SmartMedia Toshiba 3.3/5 V 1995 128 MB
MultiMediaCard Siemens AG,SanDisk MMC 1997 16 GB
RS-MMC/MMC Mobile 2003/2005 16 GB
MMCplus 2005 16 GB
MMCmicro 2005 4 GB
Secure Digital Panasonic,SanDisk,Toshiba, Kodak SD 1999 4 GB
miniSD 2003 4 GB
microSD 2005 4 GB
SDHC 2006 32 GB
miniSDHC 2008 32 GB
microSDHC 2007 32 GB
SDXC 2009 512 GB
microSDXC 2009 256 GB
Memory Stick Sony/SanDisk Standard 1998 128 MB
PRO 2003 4 GB
Duo 2003 128 MB
PRO Duo 2002-2006 32 GB
PRO-HG Duo 2007-2008 32 GB
Micro (M2) 2006 16 GB
XQD Sandisk, Sony,Nikon,CompactFlash Association Standard 2011-2012 >2 TB
xD Olympus,Fujifilm Standard 2002-2007 512 MB
Type M 2005 2 GB
Type H 2005 2 GB
Universal Flash StorageCard Extensions Samsung UFS Card 2016 >256 GB
USB flash drive Various USB 1.1/2.0/3.0/3.1 2000/2001 1 TB+

There are a few things to note about buying a memory card:There are a few things to note about buying a memory card:

  1. Compatibility

Similar to DIY computer hardware, memory cards have compatibility issues. There are some incompatibilities between memory cards of different brands and digital devices. The signs mainly include: card reading takes too long, the access speed is pretty slow, or the phenomenon of crash occurs. So when buying a memory card, you must be clear about the type of memory card that matches your device. It is safer to take the device with you.

  1. Packaging and the appearance

Pay attention to the printing quality of the packaging, whether it is clear or not, if there exist anti-counterfeit label, and then examine the overall card situation of manufacturing, whether there are deformations, concave and convex, cracks, or burrs and whether cutting angles are symmetrical and so on.

  1. Warranty period

Generally speaking, less known and inferior brands provide one year of warranty, and giant manufacturers like SANDISK generally provide 5 years of warranty, so when buying a memory card, one must make clear the warranty period, in addition, it is also necessary to request the relevant invoice and receipt.

  1. Consider products with three proofings properties (Waterproof, anti-extreme temperature, and dustproof)

In addition to the three proofings, some companies also provide shockproof, anti-magnetic, X-ray shielding and other functions, if you are involved in outdoors industry, to protect your data, such cards are the best choice.

  1. Don’t step into the “cheap” trap

Formal manufacturers usually have a reasonable price range for specific memory cards, and some manufacturers sell their cards at a very low price beyond this range, such products are usually marked with no manufacturer, no logo, no quality assurance, and have problems of slow reading and writing speed and so on. So you’d better investigate reasonable price range before you actually buy a memory card.

News Reporter
Anna began using PCs in 2001. She has worked at companies like Lenovo and Dell.

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