04, April 2017: In order to overcome the volume size limit of FAT16, while at the same time allowing DOS real mode code to handle the format, Microsoft designed a new version of the file system, FAT32, which supported an increased number of possible clusters, but could reuse most of the existing code, so that the conventional memory footprint was increased by less than 5 KiB under DOS. Cluster values are represented by 32-bit numbers, of which 28 bits are used to hold the cluster number. The boot sector uses a 32-bit field for the sector count, limiting the FAT32 volume size to 2 TiB for a sector size of 512 bytes and 16 TiB for a sector size of 4, 096 bytes.
When fat32 partitions are deleted or formatted, the success rates of recovering big files or frequently modified files are very low. For example, it is very difficult to completely recover the XLS or CDR files which are edited and modified frequently. But files remain untouched enjoy a high success rate. For example, it is very easy to recover PDF, JPG or MPG files which are not modified frequently. It is because that the FAT or fat32 partition applies file allocation table to record the information of cluster chain fragments of each file. After the deletion or formation, the information of cluster chain fragments will be emptied. For files are edited and modified frequently, due to the dynamic increase in the file length, they usually would be stored continuously in the file system, which results the impossible recovery of file fragment information and thus incompletely recovered files
Use "unformat" to recover data from formatted fat32 partition from WD hard drive after quick format, full format, accidentally formatted, reformatting, High-level formatting, Low-level formatting.
Use "recover partition" to recover data from deleted fat32 partition from WD hard drive, lost fat32 partition, changed fat32 partition, damaged fat32 partition from WD hard drive. And if the size or position of fat32 partition is changed by format, It can not recover with "unformat" , so you can use "recover partition" mode.
Use "undelete" to recover deleted files from fat32 partition WD hard drive after Virus attack, Recycle bin clear, disk cleanup, Press shift del by mistake, permanently empty recycle bin, shift delete , accidentally deleted by a mistake.
Use "Full Scan" to recover files which can not be found with "undelete" and "unformat" and "recover partition" after showing an error, display as raw file system, unformatted, unknown partition, unpartitioned, needs to be formatted.
Western Digital external hard drive as the world's leading manufacturers in the world with branches or offices on five continents around the world to provide users with storage products, WD has been committed to global personal computer users complete storage solutions, and as the global memory industry pioneer and long-term leader, Western Digital provides user and the collection, management and use digital information services organization with extensive experience. If you get your fat32 file system drive partitioned, the data is still in your system drive, but the system just cannot recognize it. Note that reformatting a disk does not erase the data on the disk, only the data on the address tables. At this time, you may use data recovery software to recover formatted files. However, if you wrote some data on the formatted drive, you may not get the formatted files back. Because the newly added data may take the place of formatted data. if the newly installed Windows system overwritten on the sectors where your important files once locates, you can recover them all. If it does; or even just overwritten a little part of the sectors where your important files once locates, you may not get these files any more.