OneDrive最酷的功能之一是它保留了同步文件的版本历史记录(version history)，以便您可以在需要时恢复旧版本。例如，您可能正在与其他人一起处理Excel 文件(Excel file)，或者您可能独自处理它，但在多个设备上。在某些时候，出现了错误，Excel 文件(Excel file)不再有用。您可以节省时间并恢复它的旧版本，这样您就可以从有用的版本恢复工作，而不是重新做所有事情。以下是从OneDrive恢复旧版本文件的方法：
步骤 1(Step 1)。使用您的Microsoft 帐户(Microsoft account)登录OneDrive 网站(OneDrive website)
打开您喜欢的Web 浏览器(web browser)并转到OneDrive 网站(OneDrive website)。使用您的Microsoft 帐户(Microsoft account)登录(Log)。请(Please)注意，您必须使用用于通过OneDrive同步文件的同一帐户登录。您现在应该看到您的同步文件。
步骤 2(Step 2)。找到要恢复到以前版本的文件，并访问其版本历史记录(version history)
在左侧列中，选择“文件”(Files)，然后浏览OneDrive的内容，直到找到您感兴趣的文件。访问该文件的版本历史记录(version history)的一种方法是右键单击（或按住它）并在上下文菜单中选择版本历史记录。(Version history)
另一种方法是选择文件，方法是单击右上角的复选框，然后按顶部工具栏中的版本历史记录(Version history)按钮。
如果您的网络浏览器窗口(web browser window)不大，您将看不到顶部工具栏中的版本历史(Version history)按钮。但是，您会在顶部工具栏中看到三个点。单击(Click)或点击它们，然后在打开的菜单中单击版本历史记录。(Version history)
OneDrive 会加载所选文件的不同版本。但是，它向您显示它们的方式因文件类型(file type)而异。
第 3 步(Step 3)：从 OneDrive恢复或下载文件(Restore or download)的旧版本
如果您要恢复使用Excel、Word、PowerPoint、Access等应用程序创建的Microsoft Office 文档，则会打开该(Microsoft Office document)Office 应用程序(Office app)的在线版本，并自动加载您感兴趣的文件。例如，看下面的截图：
我们在Excel Online中打开了一个电子表格，在左侧，我们看到了该文件的所有旧版本，以及它们的保存日期和时间。(date and time)单击(Click)或点击可用的旧版本，直到找到要使用的版本。找到您感兴趣的版本后，您有两个选择：恢复(Restore)和下载(Download)。
如果您单击或点击恢复(Restore)，文档的旧版本将成为当前版本，并且OneDrive会在您的所有设备上自动同步它。您可以从那里恢复工作并根据需要更新文件。您对其进行的任何新更新都会保存在同一文件的新版本中。
如果您想保留当前版本而不用您正在查看的旧版本替换它，那么最好下载(Download)该文件的旧版本。在“另存为(Save As)”窗口中，为文档的旧版本选择不同的位置，然后按“(document and press) 保存(Save)” 。您也可以将其保存在与当前版本相同的位置，但您应该为旧版本使用不同的名称，以便您可以将文件彼此区分开来。
OneDrive版本历史(version history)的问题：它不适用于所有文件！
2017年7 月(July 2017)，来自Microsoft的(Microsoft)OneDrive 团队(OneDrive team)吹嘘他们为所有文件类型提供了版本历史记录。(version history)您可以在此处阅读他们的公告：将 OneDrive 版本历史支持扩展到所有文件类型(Expanding OneDrive version history support to all file types)。
我们为Microsoft Office(Microsoft Office)文件尝试了此功能，并且始终有效。但是，对于图片、简单文本文件和其他文件类型，我们无法让它工作。每次我们尝试访问这些文件的版本历史(version history)时，都会遇到一个空白页面，其中没有旧版本的文件。
根据Microsoft的说法，您应该会看到类似于下面屏幕截图的版本列表。然后，您应该右键单击您感兴趣的版本并选择Restore或Open File。
注意：(NOTE:)上面的屏幕截图由Microsoft共享。我们无法在OneDrive中复制类似的行为。
OneDrive 将旧版本的文件存储多长时间？
引用微软(quote Microsoft)的话， “OneDrive将保留旧版本的文件 30 天。扩展的版本历史支持已开始推出，并将在今年夏天向所有人提供。”("OneDrive will keep an older version of your files for 30 days. Expanded version history support has started rolling out and will be available to everyone this summer.")
但是，我们发现这种说法是不真实的。对于文本文件、PDF(PDFs)和图像文件，版本历史记录(version history)对我们不起作用。对于使用Excel、Word、PowerPoint等制作的(PowerPoint)Microsoft Office文件，OneDrive保留(kept file)了六个月以上的文件版本。
您对OneDrive的版本历史记录功能(version history feature)有何体验？
如您所见，当您弄乱一个Microsoft Office 文档(Microsoft Office document)或另一个文档的版本时， OneDrive的此功能很有用。(OneDrive)我们不时使用它，每次都为我们节省了很多时间和头痛(time and headaches)。但是，Microsoft承诺使该功能可用于所有文件类型似乎并不属实。因此，我们很想知道它是否适合您。请在下方发表评论并与我们分享您的经验。
How to recover previous versions of your files and documents, using OneDrive
Оne of the coolest features of OneDrive is the fact that it keeps the verѕion hiѕtory of your synchronized files so that you can reсover older versions when you need to. For examplе, you may be working on an Excel file with someone else, or you may work alone on it, but on multiple devices. At ѕome point, a mistake is made, and the Excel file iѕ no longer useful. Yоu can save time and restore an older vеrsion of it, so that you can resume working from a version that is useful, instead of redoing everything all over again. Here is how to recover older versionѕ of your files, from OneDrive:
Step 1. Log in to the OneDrive website with your Microsoft account
Open your favorite web browser and go to the OneDrive website. Log in with your Microsoft account. Please note that you have to log in with the same account that you use to sync your files through OneDrive. You should now see your synchronized files.
Step 2. Find the file that you want to restore to a previous version, and access its version history
In the column on the left, choose Files, and then browse the contents of your OneDrive, until you find the file that interests you. One way to access the version history of that file is to right-click (or press and hold on it) and choose Version history, in the contextual menu.
Another method involves selecting the file, by clicking its checkbox in the top-right corner and then pressing the Version history button in the toolbar on the top.
If your web browser window is not large, you will not see the Version history button in the toolbar on the top. However, you will see three dots in the top toolbar. Click or tap on them, and then on Version history, in the menu that opens.
OneDrive loads the different versions of the selected file. However, the way it displays them to you differs based on the file type.
Step 3: Restore or download an older version of your file, from OneDrive
If you are restoring a Microsoft Office document created with an application like Excel, Word, PowerPoint, Access, and so on, the online version of that Office app is opened, and it automatically loads the file that interests you. For example, look at the screenshot below:
We opened a spreadsheet in Excel Online and, on the left, we see all the older versions of that file, and the date and time when they were saved. Click or tap the older versions that are available until you find the one that you want to use. Once you have found the version that you are interested in, you have two options: Restore and Download.
If you click or tap Restore, the older version of the document becomes the current version, and OneDrive synchronizes it automatically, on all your devices. You can resume your work from there and update the file as needed. Any new updates you make to it, are saved in new versions of the same file.
If you want to keep the current version without having it replaced by the older version you are looking at, then it is best to Download the older version of the file. In the Save As window, select a different location for the older version of the document and press Save. You can also save it in the same place as the current version, but you should use a different name for the older version so that you can tell the files apart from one another.
The problem with OneDrive's version history: it does not work for all files!
In July 2017, the OneDrive team from Microsoft bragged about the fact that they made version history available for all file types. You can read their announcement here: Expanding OneDrive version history support to all file types.
We tried this feature for Microsoft Office files, and it always worked. But, for pictures, simple text files, and other file types, we could not get it to work. Each time we tried to access the version history of those files, we encountered an empty page with no older versions of our files.
According to Microsoft, you should see a list of versions similar to the screenshot below. Then, you should right-click the version that interests you and choose Restore or Open File.
NOTE: The screenshot above was shared by Microsoft. We could not replicate a similar behavior in our OneDrive.
For how long does OneDrive store older versions of your files?
To quote Microsoft, "OneDrive will keep an older version of your files for 30 days. Expanded version history support has started rolling out and will be available to everyone this summer."
However, we found this statement to be untrue. For text files, PDFs, and image files, the version history did not work for us. For Microsoft Office files made with Excel, Word, PowerPoint, and so on, OneDrive kept file versions that were more than six months old.
What is your experience with OneDrive's version history feature?
As you can see, this feature of OneDrive is useful when you mess up the versions of one Microsoft Office document or another. We use it from time to time, and each time it saves us a lot of time and headaches. However, Microsoft's promises of making this feature available for all file types does not seem to be true. Therefore, we are curious to know whether it works for you or not. Please comment below and share your experience with us.
