SD Card Data Recovery

data recovery proThere is no doubt that SD card has become the most common storage device which is widely used on laptop, tablet PC, digital camera, smart phone and other electronic equipments. Why SD card is so popular? Because it’s small and easy to carry. Meanwhile, SD card accessing are quickly enough to cope with the demand of a large amount of data reading and writing rapidly. In order to meet the demand of storage market, SD card is in constant evolution. Common types of SD card on the market at present are: SD, Mini SD, Micro SD, SDHC, etc.

SD card has the advantages of being small and thin, however, this also happens to be a fatal disadvantage of the SD card. Due to the SD card is too small, it is easy to lose it. Due to the SD card is too thin, it is vulnerable to physical damage. Loss or physical damage can lead to the data in the SD card disappear completely. Therefore, SD card is not suitable for storage of important data. It is suggested that users should timely transfer important documents, pictures, videos and other data to the computer, mobile hard disk or cloud server.

If your SD card is lost or physical damaged, I’m afraid it’s hard to find the missing data. In this article, we discuss other reasons leading to data loss. For example: files are deleted by user mistakenly; SD card is formatted by user cause all files disappeared; SD card logic error cause that computer cannot access memory card.

If user deletes a file on the computer’s hard drive, it will appear in the recycle bin. However, if you delete a file on the SD card, it is disappeared. Why is that happened? In fact, the recycle bin is also a part of computer hard disk space. When a user delete files on the computer, the operating system delete files as well as moving it to the recycle bins. However, when a user delete the data in the SD card, operating system simply delete the file but not to carry it to the recycle bin.

Is it means that once the user has deleted the data on the SD card, it will not be able to restore them? Well, it depends. Technically speaking, when a user deletes files on a SD card, operating system just delete the additional information about the files in the file system (such as file address, file size, etc.), and retain raw data of the files completely. In other words, original data of the deleted files are still intact reserving in the original place. In addition, there is no difference between the normal formatting and files deleting. Due to the addressing information be deleted, the operating system can’t find the deleted files. Therefore, we need a special software which can scan each storage unit of the SD card carefully, extract useful files, and get them back again.

It is important to note that the space previously occupied by the deleted files will be marked as “free space” by the operating system. It means that if there is a new file to be written to the SD card, it is likely to cover the deleted files. Once be overwritten, the original data of deleted files is completely disappeared, and can not be restored. Therefore, once the user accidentally deleted the important data in the SD card or formatted the SD card, it is suggested to rescue the lost files according to the follow steps. Firstly, don’t write new data to the SD card, so as the deleted files not to be overwritten. Secondly, remove the SD card from your electronic equipment and keep it in save. Thirdly, download a professional data recovery tool and install it to your computer. Finally, recover lost files with the data recovery software as soon as possible.


More about the characteristics of data recovery software and the recovery steps, please refer to: Data Recovery for Windows or Mac Data Recovery.