Knowledge point analysis:
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. It's also very simple, but if we back up important documents, such as a report or a report, 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 The data in the backup is updated in time, but sometimes we feel that it has been more suitable without modification. This is even more troublesome, which means that the backup is easy, but I want to retrieve a certain data or a certain time period. Data, there will be no way to start, we need a software that can update the backup data in time, Windows built-in file history can help us.
Operating steps:
1. Mouse placed in the lower right corner --- call out the super button --- select settings --- control panel --- system and security --- file history;
2. The file history function is turned off by default. Click to start it. It can be selected for the first time. You need to select the drive for the first time. You can select the external drive (mobile hard disk or USB flash drive) and the network location. The network location needs to establish a home group, and then The files are backed up to the hard disk of other members of the family group. Since the author has not established a family group, only the related functions of the U disk are displayed here, and the use of the network is similar.
3. 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 all Files in the library, if we don't need to back up a lot of useless HD video or music files, you can select unnecessary library files in the exclusion folder, and remove a lot of unimportant video files.
4. 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 a copy of your file. Removing the USB flash drive will destroy your backup data, wait patiently for a while, and the backup will be completed.
5. 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.
6. 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 internal time according to the default time frequency. Data, 4/4 means that I have made 4 changes to the file. Every time the data is saved, if we want to restore any of the data, click the green button to restore the file.
7. Here you can restore data by selecting a time period.
8. If a large number of files in the data have not been changed, the system will skip this part. I thought it would take a lot of time to complete the recovery. I skipped these items and it was completed very quickly.
9. In the advanced settings, you can change the frequency of saving files in the system. 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.
The total file history, not only can backup data, but also the function of the time machine, we can choose the data to recover in a certain period of time, which is similar to many mobile phone address book assistants nowadays. It is convenient to select data from a certain period of time in the past to recover.