When all kinds of mobile storage devices get widely used, more data loss incidents occur on them, rather than on a computer's hard drive. Accordingly, most often what we need are specialized tools used to recover the lost data on these mobile storage devices.

The causes of loss of data are nothing else than the following several common ones: accidentally deleted files/folders; formatted some partition or the entire hard drive (which often happens during the reinstallation of OS); due to wrong operations (unexpected or forcible shutdown, direct or forced pullout, etc.), the invalid partition table error occurred in hard disk, USB flash drive, SD Card and other storage devices, so that they couldn't be identified or just identified as RAW format.

Since the days of DOS, DiskMan has been a well-known disk partition management freeware for a very long time around the world. Now it has become more professional and powerful Eassos PartitionGuru (has changed to use its old name DiskGenius again), which also has emerged in the field of data recovery.