What is SD Card

2020-07-24
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Summary: SD card (Secure Digital), developed by the SD Card Association (SDA),  is a proprietary non-volatile memory card format used in portable devices. Despite the small size and weight, it has a high storage capacity.

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Capacity

SD card includes five card families: the original Standard-Capacity (SDSC), the High-Capacity (SDHC), the eXtended-Capacity (SDXC), the Ultra-Capacity (SDUC) and the SDIO. They can be used in three different sizes: the original size, the mini size, and the micro size.

  • SD (SDSC): The second-generation Secure Digital card was developed to improve on the MultiMediaCard (MMC) standard. It evolved continuously in a different direction.
  • SDHC: Announced in January 2006, and as the version 2.0 of the SD specification, it supports capacities up to 32 GiB for SD cards.
  • SDXC: Announced in January 2009, and as the version 3.01 of the SD specification, it supports up to 2 TiB capacity for SD cards. It is mandatorily adapted to Microsoft’s exFAT file system.
  • SDUC: Announced in June 2018, and as the version 7.0 of SD specification, it supports up to 128 TiB capacity and offers up to 985 MB/s speed.

Comparison of SD card capacity standards

Speed

The read and write speeds of different types of SD cards vary. The chart lists the comparison of SD card bus speeds:

The newer SD cards improve their card speed by increasing the bus rate. In line with a higher speed rating, it ensures the limitation of the card to use the “busy” indication.

Advantages VS Disadvantages

Advantages

  • Increased Storage
  • Removable & Portable
  • Cost-Effective
  • Reduce Memory Consumption
  • Require Little Power
  • Easily Accessed
  • Non-volatile Memory

Disadvantages

  • Physically fragile
  • Finite read/write Cycles
  • Slower than primary Memory
  • Apps disappear after removing it

SD Card Protection–Data Recovery

To some degree, Some SD cards can protect against water, shock, and x-rays. Besides, compared with standard cards, some can endure more extreme temperatures. However, data loss in the SD card is unavoidable.

If an SD card meets the following scenarios: logical errors, mistakenly deleted, unexpectedly formatted, virus attack, etc., reliable data recovery software is necessary. Bitwar Data Recovery is a professional and effective data recovery software that can recover nearly all types of files in many different situations. Also, this software offers a 30-day free trial without space limitation.

Steps to Recover Data on SD Card

Step 1: Download Bitwar Data Recovery and install it to PC.

Step 2: Select the SD card where data lost.

Step 3: Select a scan mode and file type.

Step 4: Preview the result and recover the data.

Sum It Up!

In the end, an SD card is one of the best external devices for users to store data or documents instead of using a heavier external device such as the hard drive. Moreover, the SD card is more efficient and takes up much smaller spaces when storing the smaller size of documents.

Besides, it comes with different sizes of Memory and design, which is best suits the need of users based on the different situations and requirements during data storing.

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