When we need to back up important files, most of them will choose to copy the files to the U disk or mobile hard disk. If the network speed is good, it can also be backed up to the cloud. Although these two methods are very safe and simple, if When we back up important documents, such as a report or report written, and modify it one day, we may forget to update the data in the backup at the same time. The cloud is more difficult to operate, if we update the data in the backup in time. However, sometimes we feel that it is more appropriate to not modify it before. This is even more troublesome, which means that backup is easy, but if you want to retrieve a certain data or multiple data in a certain period of time, you will not be able to start. We need a software that can update the backup data in time. The built-in file history of Windows can help us with this pure version of ghost xp sp3. Mouse is placed in the lower right corner —— callout super button —— select settings —— control panel —— system & security——file history file history function is off by default, click to start Can be turned on, the first use needs to select the drive, you can choose external drive (mobile hard disk or U disk) and network location, the network location needs to establish a family group, and then back up the files to the hard disk of other members of the family group, because the author does not Establish a family group, here only shows the use of U disk related functions, the use of the network is similar to the ghost xp sp3. Unfortunately, the file history does not support the active selection of the drive folder, only supports linking to the library, but in fact, we can associate the files that need to be backed up to the library. The default is to back up the files in all the libraries, if we don't You need to back up a lot of useless HD video or music files. You can select unnecessary library files in the exclusion folder. A lot of unimportant video files are removed here. Click Run now to back up the library file. The speed depends on the size of the files in your library. The first time is slow. Now the file history is showing that you are backing up your file copy. At this time, removing the U disk will destroy the file. Your backup data, waiting patiently for a while, will be backed up. At this time we open the U disk, you will see the following folder. The xml file in Configuration is the layout management of the backup data. We don't need to understand this part. The data we backed up is saved in the Date folder. We can read the file in it, but it is very troublesome, we can Retrieve the backed up data by restoring personal files in the file history. Click on the restore personal file in the left column, you will see an interface that can be selected from left to right. Every time we change the files in the library, the system will automatically update the data in the default time frequency, 4/4 means me. The file was changed 4 times, and each time the data was saved. If we want to restore any of the data, click the green button to restore the file. Here you can select a time period to recover the data. If a large number of files in the data have not been changed, the system will skip this part, thinking that it takes a lot of time to complete the recovery, skipping these items, and quickly completed. In the advanced settings, you can change the frequency of the system save files. The default is one hour. Of course, if we need to update now, we can also update it manually. You can also change the size of the offline cache, the saved version, and select the default settings. In short, the file history, not only can back up the data, but also the function of the time machine, we can choose the data to recover from a certain period of time, which is very similar to many mobile phone address book assistants now, you can choose one in the past The data of the time period is restored, which is very convenient.