'%3e%3cpath%20d='M8%200C12.4183%200%2016%203.58172%2016%208C16%2012.4183%2012.4183%2016%208%2016C3.58172%2016%200%2012.4183%200%208C0%203.58172%203.58172%200%208%200ZM11.6162%204.38379C11.2257%203.99337%2010.5927%203.99338%2010.2021%204.38379L8%206.58594L5.79785%204.38379C5.40732%203.99334%204.77429%203.99329%204.38379%204.38379C3.99331%204.77429%203.99335%205.40733%204.38379%205.79785L6.58594%208L4.38379%2010.2021C3.99348%2010.5927%203.99341%2011.2257%204.38379%2011.6162C4.77426%2012.0066%205.40734%2012.0065%205.79785%2011.6162L8%209.41406L10.2021%2011.6162C10.5927%2012.0066%2011.2257%2012.0067%2011.6162%2011.6162C12.0067%2011.2257%2012.0066%2010.5927%2011.6162%2010.2021L9.41406%208L11.6162%205.79785C12.0066%205.40735%2012.0066%204.77429%2011.6162%204.38379Z'%20fill='%23080E17'%20fill-opacity='0.46'/%3e%3c/g%3e%3cdefs%3e%3cclipPath%20id='clip0_3761_713'%3e%3crect%20width='16'%20height='16'%20fill='white'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e)
How to Move Millions of OneDrive for Business Files to an External Drive
Question details
The user needs to transfer several terabytes of data, consisting of millions of small files, from OneDrive for Business to an external hard drive efficiently.
- Product
- OneDrive for Business
- Device & OS
- not provided
- Scenario
- Backing up or migrating a massive enterprise OneDrive library containing millions of small files to a local external storage drive.
- Observed behavior
- The standard OneDrive sync client is extremely slow and takes months due to service request limits and server throttling when handling a high volume of small files.
Ensure your external drive is formatted with a file system that supports large files (such as exFAT or NTFS) and has sufficient free space to accommodate several terabytes of data.
Batch Download via the OneDrive Web Interface
Bypass the slow desktop sync client by organizing files into smaller folders and downloading them in batches as ZIP files directly from the web interface.
Relying on the standard OneDrive sync client for millions of files triggers service throttling, as every single file requires an individual server request. Even third-party scripts encounter these same limits.
By using the web interface, OneDrive automatically packages selected folders into ZIP archives. While the server still processes files individually to create the archive, downloading bundled ZIP files significantly reduces local synchronization errors and makes the overall transfer to an external drive more manageable.
Log into the OneDrive for Business web interface. Group your loose files into manageable, smaller folders to prepare them for batch downloading.
Select a limited number of folders at a time. Avoid selecting the entire library at once, as massive requests can cause the ZIP creation process to fail or time out.
Click the 'Download' button in the top menu bar. OneDrive will compile the selected folders into a ZIP file and initiate the download to your local computer.
Once the download completes, connect your external drive. Move the ZIP file to the external drive and extract the contents, or extract the files directly to the drive from your local downloads folder.
Need a Lightweight Alternative for Heavy Office Work? Try WPS Office
While managing massive OneDrive libraries can be taxing on your system and network, your office software shouldn't be. WPS Office offers a free, lightweight, and incredibly fast alternative to Microsoft Office. It integrates seamlessly with local external drives, making it perfect for efficiently managing and editing the millions of documents you just downloaded.
- 1. Download WPS Office: Visit the official WPS website and download the free installer for your operating system.
- 2. Install the Suite: Run the lightweight installer to quickly set up WPS Office without burdening your system.
- 3. Open External Files Easily: Open WPS Office and browse directly to your external drive to access and edit your downloaded documents seamlessly.
Frequently Asked Questions
Why is the OneDrive sync client so slow for millions of small files?
The sync client processes each file individually, communicating with the server for every single item. When dealing with millions of small files, this massive number of individual requests triggers server-side throttling to protect server performance, severely reducing your transfer speeds.
Can I use third-party scripts or tools to bypass OneDrive throttling?
No. Different clients and third-party scripts will still encounter the same service request limits and throttling mechanisms as the official OneDrive client. While they might process requests in bursts, the average transfer speed will likely remain unchanged.
Is there a server-side archive method to download the entire OneDrive library at once?
Currently, there is no reliable server-side archive operation provided by OneDrive for Business that completely avoids individual file processing and service limits for extremely large libraries. Organizing folders and downloading in batches via the web interface remains the most dependable workaround.
