Data loss can happen from any storage devices like hard drive, memory cards or due to problems related to Operating system. The main few reasons for data loss such as files deleted emptied the recycle bin, deleting a files using Dos command, or using shift+Delete keys to delete a files, virus attack, file system corruption, software malfunction, accidentally deletion of files, and unintentional formatting of the drive or partitions. This makes stored files inaccessible from the hard drive. When you delete a file from hard drive if do not gets completely removed from the hard disk only the index of the files are removed from file directory. Operating system makes space as free space available of saving new data. But still the deleted files available on the hard drive but you will not able to access the deleted files from the hard drive. In such cases if you want to restore deleted files from Windows hard drive you need to use any good undelete software to undelete deleted files.
If you are using Mac operating system use any good Mac file recovery software to restore Mac trashed files. While selecting a software check the software supports with Mac file system.
How to select good file recovery application?
Select a good file recovery software check whether the utility supports for both FAT and NTFS file system. If you are using Mac Operating system select the utility compatible with HFS and HFS+ file system. Check the utility is capable to recover files from different file type and from various data loss conditions. Download freeware demo version of the software to check the capability of the software in recovering delete files. Based on the results buy a software to recover deleted files from Windows or Mac Operating System.