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Zip file partial downloads no longer available


OneDrive: Zip file partial downloads no longer available

The possibility to upload a large zip file to OneDrive or SharePoint Online libraries remains. Previously, however, it was possible to extract and download one or more parts of the zip file via the web interface. However, since the code executed in the cloud was buggy (multiple files were packed back into a zip and then downloaded, unfortunately buggy) Microsoft has decided to discontinue this feature.

Microsoft MC247658

Starting May 2021, it will no longer be possible to download individual files or subsets of files within .zip file previews in OneDrive and SharePoint on the web . Instead we recommend downloading the entire .zip file, extracting its contents and using the files needed. In the past, we have received customer feedback that at times when a user selects a subset of files to download from within a .zip file, the files are not downloaded successfully. As we focus our investments on downloading entire .zip files, we are retiring the partial download feature as users can edit .zip files as needed once downloaded.

Key points:
•    Timing: Early May 2021
•    Action: review and assess for your organization

How this will affect your organization:

Users will no longer be able to download individual files from .zip file previews in OneDrive and SharePoint on the web when this change is implemented. Users will maintain the ability to preview and navigate through the contents of a .zip file. If a user wishes to download the partial contents of a .zip file, they must download the entire .zip file. They may then delete any unnecessary files from the downloaded .zip.

What you need to do to prepare:
Please make your end users aware of this change, and update your documentation as needed.
Instead of using .zip file previews to download individual files, we recommend downloading the entire .zip file, and extracting its contents to get the necessary files.

my comments:

Actually, this was to reduce a large number of files in the synchronization. Because for the sync client, for example, it wasn’t 50,000 files to sync, it was just one. And I didn’t have to download the whole zip file to extract it locally.
This reduction (50,000 to 1 file) took the load off the sync engine (OneDrive.exe).

So instead of addressing the buggy code, the feature is simply disabled. This raises the question: why should I still sync the zip file to the cloud at all?

In the business environment with poor internet connection and large number of images, I would advise uploading the images to a separate document library on SharePoint Online, but disallow synchronization with local devices. Individual files can then be identified via the web browser and downloaded manually.

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