Windows 10: backup, what I did not found in official documentation

In windows 10 there is another type of backup named “File history”.

Microsoft Help and other articles say: just specify what folders it should backup and where backup must be saved. Then Windows 10 will backup older versions of your files and you can view and restore them when required. Magically.
I like magic, especially when I understand how it works.

I have Windows 10 and I want to migrate from external backup application to built-in. Some interesting things I discovered and I did not read in the documentation.

1. Backup checks files every hour - fine, but this sounds like it is single file based. This means that it could happen that when I restore folder from backup I could have inconsistent state - one file is is restored as it was at 18:00 another as it was at 18:30. Probably this is not the case, but I did not found any description of this logic.

2. You know my disk has some limited size. Luckily in advanced settings one can configure how long history Windows must keep in a backup. But guess, what? Default selection is “forever” (I have no ideas what happens when it uses all available space on the target drive)

3. How can I know see that backup works and how successful it is?. The answer is: you mostly cannot. I manually started initial backup for my photo archive, the only way to see that something was happening was - huge network traffic and terrible surfing performance. BTW, there is no way to pause backup either.

4. I also discovered that I cannot specify a folder as target backup location, only a drive.
The good thing is, it looks like that Windows stores files in backup as is adding timestamp in the name. I like this solution, it allows me to restore required file manually - what is safer.

Anyway, generally I hope that "File History" will work for me well enough. I give it a try.

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