CBL Data Recovery Logo

Ultimate Guide On SD Card And Its Storage Technology

Ultimate Guide on SD Card and its Storage Technology

Table of Contents

A Secure Digital (SD) card is a portable flash memory chip used for data storage. We also know SD cards as “memory cards”. They are used in various digital devices like smartphones, cameras, set-top boxes, etc. 

SD cards are known for their portability. Because they are small in size and lightweight, making them extremely convenient to carry and use. In addition, SD cards are safer than other storage devices like USB drives or hard drives. However, if you still lose data by any chance, going for SD card data recovery services is the best approach. 

Moreover, while selecting an SD card, you must keep the respective use case in mind. For instance, some require high data speeds to transfer camera footage to their computers. While some users need an SD card to just perform regular tasks, like using it with a smartphone for file storage.

Furthermore, SD cards come with different storage capacities and data transfer speeds. You will get more clarity over the same after going through the article. So, let’s get started!

Different Types of SD Cards With Their Storage Capabilities

SD cards are divided into four major categories:

  • Secure Digital
  • Secure Digital Standard Capacity
  • Secure Digital eXtended Capacity
  • Secure Digital Ultra Capacity

The above-mentioned SD cards differ based on their storage capacities and the file system they use. So, let’s check them out, one by one. 

Secure Digital

They are the basic variant of SD cards with a storage capacity of 2 GB which is enough for old feature phones. But, the FAT16 file system is not supported on the majority of devices these days. Consequently, they are slowly getting out of mainstream usage due to outdated technology. 

Secure Digital Standard Capacity (SDSC) Cards

They come with a maximum storage capacity of up to 32 GB which is enough for most mobile devices. Besides, the Secure Digital Standard Capacity (SDSC) cards use the FAT 32 file system. It is one of the most used file systems. However, as the devices are getting advanced hardware and the application size is increasing, we are slowly shifting to “Secure Data eXtended Capacity” technology.

Secure Digital eXtended Capacity (SDXC) Cards

This category of SD cards comes with a maximum storage capacity of up to 2TB. Besides, they use the exFAT file system introduced by Microsoft, which is optimised for SD cards and USB Flash drives. The exFAT file system performs better when used with external devices, and the users get high data read and write speeds. Hence, using this category of SD cards, users can perform all the tasks without any compromises for many upcoming years. 

Secure Digital Ultra Capacity (SDUC) Cards

It is the newest instalment in the SD cards that comes with up to 128 TB of storage. They also used the exFAT file system like Secure Digital eXtended Capacity (SDXC) Cards. The storage capacity of these SD cards is so much that most users can’t even fully utilise them. They are ideal for professional users such as transferring long 4K footage from digital cameras to computers.

How Does SD Card Store Data?

Unlike storage devices like hard drives, SD Cards don’t have mechanical moving parts that make them a faster storage media. They use NAND chips to store data. This electronic way of transferring data facilitates higher data rates than devices like Compact Disks (CDs).

Also, they are comparatively more resistant to physical damage because NAND chips used in them do not wear easily. For this reason, users can read or write data on them, thousands of times, without any issue. Still, if you lose data from the SD card, consider reaching out to an expert for data recovery services in Singapore, to get professional assistance.

Most devices come with a dedicated slot for an SD card which allows the users to simply insert the storage media and start using it. However, the size of the SD card may be smaller or bigger than the provided slot. So, make sure to check the size of the slot before selecting an SD card. For instance, you can’t use a camera SD card with your smartphone as it is bigger in size.

Furthermore, mobile devices have a limited maximum capacity up to which they support an SD card. So, there is no point in buying a higher storage capacity card if it is not even detected by the smartphone. Moreover, digital cameras only support some specific variants of SD cards, so don’t forget to check them before you buy one.

Advantages of Using SD Card

Increases Storage of Mobile Devices

Nowadays, the size of mobile applications is increasing. So, the smartphone’s internal memory gets totally occupied after a certain time. In such a situation, SD cards come in handy as they serve as an extra storage option, other than the mobile’s internal storage. 

Portable and Removable Storage Option

The small size of SD cards makes them a highly portable storage media. Consequently, they can be easily inserted into or ejected from various digital devices. On the other hand, bulky storage devices like hard drives are difficult to use this way.

Non-Volatile Memory

SD card uses non-volatile memory for storing files. It means that the data stays intact on the media, even if the device is not getting power. For example, when we open some apps on the smartphone they run in the Random Access Memory (RAM). So, if we turn off the smartphone, the apps will be gone because RAM is a volatile memory. 

But the files stored on the SD card in your smartphone like photos, videos, etc are still there, even after switching off the device. Because SD cards make use of non-volatile memory for file storage.

Consumes Less Power

SD cards require minimal power to operate. For this reason, they are widely used in battery-operated devices like camcorders, smartphones, etc. On the contrary, storage devices like USB flash drives and hard disks consume more battery.

Common Uses Of SD Card

SD cards are used for various purposes. For instance, one of the common use cases is to transfer files like photos, videos, etc from devices like mobile phones or cameras. They are mostly used with the below-listed devices. 

  • CCTV Cameras
  • Smartphones
  • Computer and Laptops
  • Gaming Consoles
  • Digital Camcorders

SD cards are comparatively more secure than other storage media. But, they are still prone to data loss from the damage caused by dust, water, and other causes. Hence, if you lost important data, consider using data recovery software to fix the issue. However, if this method doesn’t work, it is better to contact a data recovery professional.

What To Do If You Lost Data From SD Card?

SD cards can lose data due to following reasons:

  • Physical Damage
  • Card Gets Corrupted
  • Accidental Deletion
  • Bad Sectors
  • Malware or Virus Attack
  • Damaged SD Card Slot

In addition, sometimes the data is present on the SD card but not properly shown due to formatting issues. Whatever the issue, a data recovery expert can retrieve your important files fastly and securely.


In case of a data loss scenario, you can get the storage media checked by a professional like CBL Data Recovery. Because they are the most trusted name for data recovery in Singapore. Firstly, you get an in-lab evaluation for free. Afterwards, they start the data recovery process if you approve. 

CBL Data Recovery offers a “No Data, No Charge” policy. So, you only have to pay if you get the data recovered successfully. Also, they have years of experience dealing with issues regarding data loss on SD cards. Consequently, their team is able to provide reliable data recovery solutions. So, get in touch with one of their experts to safely get your SD card data recovered.

Share :

Get A Quote