Many people have deleted the wrong file when the file has been accidentally lost, a lot of computer companies now have a data recovery business, but also set the price very high, not the individual can accept, in fact, data recovery is also dependent on A variety of data recovery software, as long as the master of the use of these software, we can get back some of their own deleted files. Data recovery software is also there are many, here I'll share a personal feel it is rather easy to use data recovery software, Data Recovery tools Mac (http://www.umacos.com/data-recovery-mac.html), for usually we recover some deleted files is sufficient. Introduction is necessary before the data recovery software to say what about the principle of data recovery software: In fact, some of that popular, our file exists on the hard disk is like a linked list as the file header is the starting address, the document is not necessarily continuous, but a node in a node connected, and when we find This document, as long as the header to find it. When we delete this file, simply delete the header and the data did not delete the entire file, to wait for the future we need to store new data, the data will be automatically overwritten. So why deleted files can be restored, is this principle, so it can not recover all the deleted files, disk data has been overwritten it can not be restored. Data Recovery for Mac is a kind of Data Recovery tools Mac (http://www.umacos.com/data-recovery-mac.html) that recovers deleted or lost data due to accidental deletion or formatting of HFS, HFS+, HFSX, and FAT file system volumes or corruption of the storage media. Even the data, file from recycle bin or permanently deleted by shift+ delete can be recovered by Data Recovery for Mac. And this data rescue mac os x (http://www.umacos.com/data-recovery-mac.html) also recovers lost/deleted music, video, photo files.