如何在Windows 10的Fall Creators Update中按需使用OneDrive的文件
The Fall Creators Update includes a new OneDrive feature called “Files On-Demand”, in which your PC now shows “placeholder” copies of your OneDrive files. When you or a program accesses them, they’re downloaded as needed. That way, even if you have 1 TB of files in your OneDrive, they can take up almost no space on your PC, and you can still browse through them in File Explorer.
Fall Creators Update包括一项称为“文件按需”的OneDrive新功能，您的PC现在可以在其中显示OneDrive文件的“占位符”副本。 当您或程序访问它们时，会根据需要下载它们。 这样，即使您的OneDrive中有1 TB的文件，它们也几乎不会占用您PC上的空间，您仍然可以在File Explorer中浏览它们。
This is basically the placeholder files feature found in Windows 8.1, but better and without the compatibility problems that led Microsoft to remove it. Of course, Dropbox and Google Drive are now rolling out similar features as well.
这基本上是Windows 8.1中的占位符文件功能，但更好，并且没有导致Microsoft删除它的兼容性问题。 当然， Dropbox和Google云端硬盘现在也推出了类似的功能。
如何按需启用(或禁用)文件 (How to Enable (or Disable) Files On-Demand)
OneDrive now seems to automatically enable this feature. You just have to sign into OneDrive with your Microsoft account. If you sign into your PC with your Microsoft account, you’ll be automatically signed in. If you don’t, you need to launch the OneDrive application from your notification area—it looks like a cloud icon—and sign in.
现在，OneDrive似乎会自动启用此功能。 您只需要使用您的Microsoft帐户登录OneDrive。 如果使用Microsoft帐户登录PC，则会自动登录。如果未登录，则需要从通知区域(它看起来像云图标)启动OneDrive应用程序并登录。
To confirm that OneDrive Files On-Demand is enabled, right-click the OneDrive icon in your system tray and select “Settings”, or left-click the icon to open the popup and click the gear icon.
要确认已启用按需OneDrive文件，请右键单击系统任务栏中的OneDrive图标，然后选择“设置”，或左键单击该图标以打开弹出窗口，然后单击齿轮图标。
On the Settings tab, check that “Save space and download files as you use them” is enabled under Files On-Demand.
在“设置”选项卡上，检查“按需文件”下是否启用了“节省空间并下载文件，以备不时之需”。
If you don’t want to use this feature and want all your OneDrive files downloaded to your PC—so you can more easily back them up or ensure you have all of them available offline, for example—you can disable this feature and OneDrive will behave like it used to. You still have the option to selectively sync folders, if you like.
如果您不想使用此功能，并希望将所有OneDrive文件下载到PC上(例如，您可以更轻松地备份它们或确保所有文件都可以脱机使用)，则可以禁用此功能，OneDrive将表现得像以前一样。 如果愿意，您仍然可以选择有选择地同步文件夹。
If you don’t see the option here, your PC probably hasn’t been upgraded to the Fall Creators Update yet.
如果您在此处看不到该选项，则您的PC可能尚未升级到Fall Creators Update。
If you have upgraded to the Fall Creators Update and still don’t see the option, you don’t have the latest version of OneDrive yet. Microsoft is slowly rolling out the OneDrive update for some reason. To get it now, download the OneDrive setup application from Microsoft and run it.
如果您已升级到Fall Creators Update，但仍然看不到该选项，则说明您还没有最新版本的OneDrive。 Microsoft出于某种原因正在缓慢推出OneDrive更新。 要立即获取，请从Microsoft下载OneDrive设置应用程序并运行它。
如何选择哪些文件按需可用 (How to Choose Which Files Are Available On-Demand)
OneDrive doesn’t necessarily show all your files and folders in File Explorer. To choose which it shows, click the “Account” tab in the OneDrive settings window and click the “Choose folders” button.
OneDrive不一定会在文件资源管理器中显示所有文件和文件夹。 要选择显示的内容，请在OneDrive设置窗口中单击“帐户”选项卡，然后单击“选择文件夹”按钮。
This window allows you to choose which files are visible in the OneDrive folder on your PC. You can click the “Make all files available” checkbox and all your OneDrive folders will be visible in File Explorer. You can uncheck folders here to hide them from File Explorer, if you like. They won’t appear in File Explorer on your PC, but will be available online in your OneDrive storage.
此窗口使您可以选择哪些文件在PC的OneDrive文件夹中可见。 您可以单击“使所有文件可用”复选框，所有OneDrive文件夹将在文件资源管理器中可见。 如果愿意，您可以在此处取消选中文件夹以从文件资源管理器隐藏它们。 它们不会出现在PC的文件资源管理器中，但可以在OneDrive存储中在线使用。
如何查看哪些文件在线和哪些文件离线 (How to View Which Files Are Online and Which Are Offline)
All your OneDrive files will now appear in File Explorer. Open File Explorer, select OneDrive, and you can browse through everything stored in OneDrive.
您的所有OneDrive文件现在将出现在文件资源管理器中。 打开文件资源管理器，选择OneDrive，然后您可以浏览OneDrive中存储的所有内容。
There’s a new “Status” column that appears only in the OneDrive folder. This shows you the status of your files and folders—whether they’re “Available when online” (the cloud icon), “Available on this device” (the green checkmark), or “Syncing” (the blue refresh icon or progress bar). You can also mouse-over these icons to see a tooltip explaining what they mean.
有一个新的“状态”列，仅出现在OneDrive文件夹中。 这将显示文件和文件夹的状态-它们是“联机时可用”(云图标)，“在此设备上可用”(绿色复选标记)还是“正在同步”(蓝色刷新图标或进度条) )。 您也可以将鼠标悬停在这些图标上，以查看说明其含义的工具提示。
To open a file, just double-click it or access it normally in any application. Windows will automatically download it and it will open. As long as you have an internet connection, you don’t really have to worry about where the file is. Of course, very large files may take a while to download, depending on the speed of your connection.
要打开文件，只需双击它或在任何应用程序中正常访问它。 Windows将自动下载并打开。 只要您可以连接互联网，您就不必担心文件在哪里。 当然，非常大的文件可能需要一段时间才能下载，具体取决于您的连接速度。
This isn’t just a trick File Explorer is playing, either. Windows presents these placeholder files to applications as normal files, so they should work with every application. Even if you access a file in your OneDrive with a command-line tool, the tool will be able to find that file and Windows will immediately start the download.
这也不只是File Explorer正在玩的一种技巧。 Windows将这些占位符文件作为普通文件呈现给应用程序，因此它们应与每个应用程序一起使用。 即使您使用命令行工具访问OneDrive中的文件，该工具也将能够找到该文件，并且Windows将立即开始下载。
如何管理哪些文件脱机存储(哪些不脱机) (How to Manage Which Files Are Stored Offline (and Which Aren’t))
While OneDrive attempts to automatically manage which files are stored on your PC and which aren’t, you can also manage this yourself. For example, you may want to tell OneDrive to download some important files so know you’ll have them when you’re offline. Or, you may want to tell OneDrive to free up the space used by a large file you no longer need on your device.
虽然OneDrive尝试自动管理哪些文件存储在您的PC上，哪些不存储，但您也可以自己进行管理。 例如，您可能要告诉OneDrive下载一些重要文件，以使您知道离线时就会拥有它们。 或者，您可能要告诉OneDrive释放设备上不再需要的大文件占用的空间。
To do this, right-click a file or folder in OneDrive and select the “Always keep on this device” or “Free up space” option. If you select “Always keep on this device”, OneDrive will download the file to your device and will never automatically remove it to free up space. If you select “Free up space”, OneDrive will remove the file from your local device immediately but it will remain accessible online and will be redownloaded if you access it again.
为此，请在OneDrive中右键单击文件或文件夹，然后选择“始终保留在此设备上”或“释放空间”选项。 如果您选择“始终保留在此设备上”，OneDrive会将文件下载到您的设备，并且永远不会自动将其删除以释放空间。 如果您选择“释放空间”，OneDrive将立即从本地设备中删除文件，但仍可在线访问，如果再次访问它，将重新下载该文件。
如何控制哪些应用程序可以下载文件 (How to Control Which Applications Can Download Files)
Whenever any application other than File Explorer starts a OneDrive file download, you’ll see a popup notification informing you the application downloading a file from OneDrive. The notification will display the name of the file being downloaded and the download progress. If you don’t want the application to download the file, you can click “Cancel download”.
每当“文件资源管理器”之外的任何应用程序开始下载OneDrive文件时，您都会看到一个弹出通知，通知您应用程序正在从OneDrive下载文件。 通知将显示正在下载的文件的名称和下载进度。 如果您不希望应用程序下载文件，则可以单击“取消下载”。
If you do click this button, Windows will warn you that cancelling a download could make the program unstable. The program probably isn’t expecting the file to not open, and it may or may not be prepared to handle this in a clean way. The application may crash and need to be re-opened.
如果确实单击此按钮，Windows将警告您取消下载可能会使程序不稳定。 该程序可能不希望该文件无法打开，并且它可能会也可能不会以干净的方式进行处理。 该应用程序可能崩溃，需要重新打开。
To cancel this particular download, click “Cancel download”. To cancel this download and prevent this particular application from downloading files in the future, click “Block app”.
要取消此特定下载，请单击“取消下载”。 要取消此下载并阻止该特定应用程序将来再下载文件，请单击“阻止应用程序”。
You can manage app you’ve blocked from automatically downloading files from the Settings > Privacy > Automatic file downloads screen. If you’ve blocked apps, you can click the “Allow” button to unblock all apps. If you haven’t blocked apps, the “Allow” button will be grayed out.
您可以在“设置”>“隐私”>“自动文件下载”屏幕中管理已阻止自动下载文件的应用。 如果您已阻止应用程序，则可以单击“允许”按钮以取消阻止所有应用程序。 如果您尚未阻止应用，则“允许”按钮将显示为灰色。
Unfortunately, Windows doesn’t just show you a list of blocked applications and allow you to manage them. So, if you want to unblock a single app, you have to unblock all apps.
不幸的是，Windows不仅向您显示被阻止的应用程序列表，还允许您对其进行管理。 因此，如果要取消阻止单个应用程序，则必须取消阻止所有应用程序。
This feature makes that 1 TB of OneDrive storage offered with Office 365 subscriptions easier to use and more flexible. Even if you’re storing a lot of files in OneDrive, they won’t automatically sync to all your devices and fill up their local storage.
此功能使Office 365订阅提供的1 TB OneDrive存储更易于使用和更灵活。 即使您在OneDrive中存储了大量文件，它们也不会自动同步到您的所有设备并填充其本地存储。
翻译自: https://www.howtogeek.com/329406/how-to-use-onedrives-files-on-demand-on-windows-10/