Memory card readers are external computer accessories or devices that help to access data stored in the memory card. However, today most of the digital cameras, laptops, smartphones, and other devices have a built-in card reader that increases the storage capacity of the device.

In this age of digital technology, flash-based memory card readers have become the preferred choice of the customers. These card readers are designed in such a way that you can easily exchange the card between different devices. Due to their non-volatile features, the memory or data remains persistent. You can also replace, reuse or format these cards with ease.

However, having said that you have to consider a few essential factors before making a purchase. For instance, you need to take into account the compatibility, the storage capacity, and of course the price.

In this blog, I will be highlighting the important types of flash memory card readers.

The Important Types of Flash Memory Card Readers.

Security Digital Cards or SD Card

The most popular and extensively used memory cards for computers are secure digital cards known as SD cards. They are the ones that you can easily fit into your electronic gadgets such as mobile phones or digital cameras.

It is interesting to note that these SD cards made their inception about a couple of decades ago in 1999. They are available in various capacity ranges.
A few years ago, a 1 GB memory card was considered sufficient enough to store your data. However, nowadays, you can easily find 2 TB SD cards from the best online marketplace for sellers. The dimensions include 32mmx24mmx2.1mm.

The smaller version of the SD card is known as MiniSD, which is mostly used by smartphone manufacturers for storing data. They have the same features and benefits as a usual SD card.

The manufacturers have even gone down to introduce the MicroSD cards, which consumes about ΒΌ space of the total size of the normal SD card. This has been possible due to an escalation in technology.

Multimedia Cards or MMC

These cards have been introduced as an alternative for the SD cards. They can easily fit into the size of the SD card, providing a maximum speed of about 2.5 MB per second.

XD Picture Cards

As the name suggests, it is mostly used in digital cards. It allows you to store the maximum number of high-quality images without any difficulty. All major digital camera brands such as Nikon, Olympus, etc. support XD cards. The dimension is about 20mmx25mmx1.7mm.

Compact Flash Cards

The compact flash card is a specific device that runs on two voltages. The benefit is that the card can be swapped across various devices supporting it seamlessly. Another advantage is that there is no data loss or data corruption during the device exchange.

The compact flash cards are available in two varieties-
Type I and
Type II

Both these types of Compact Flash cards have different capacities. Also, they have been developed according to the PCMCIA PC Card standards. They can easily fit into the PCMCIA slot with an adapter.

Speaking of dimensions, the size of Type I is about 42.8mmx36.4x3.3mm. On the other hand, Type II is 42.8mmx36.4mm x5.5mm.

Some General Information About Cards

You have to be extremely careful while inserting the cards in your devices. If you do not insert it properly, it is likely to damage your socket, after which your card will become futile. Experts say the best memory card readers can withstand about 10,000 insertions. The cards are quite robust physically and can withstand heat.

In addition, if you are transferring data on the memory card, make sure you do not remove it halfway through. If you eject the card in the middle, you will lose all your data.


Whether you are buying the best desktop motherboard or a memory card reader, make sure you check the warranty of the product. It is recommended to choose a branded device and not compromise on the price factor.