OneDrive File Issues

How to Fix Slow OneDrive Uploads for Large 250 GB File Transfers

Jason Miller Oct 21, 2026 869 views

Question details

The user is experiencing excessively slow upload speeds when trying to synchronize 250 GB of data consisting of 45,000 files to OneDrive.

How to Fix Slow OneDrive Uploads for Large 250 GB File Transfers

Product: OneDrive
Device & OS: not provided
Scenario: Uploading a massive bulk of files to cloud storage, expecting fast completion due to a high-speed internet connection.
Observed behavior: The synchronization process is extremely slow and taking much longer than expected, primarily because the massive quantity of small files creates significant per-file processing overhead.

Before you start

Before attempting to fix the sync speed, check your OneDrive network settings to ensure the 'Upload rate' limit is set to 'Don't limit' so the application can utilize your full bandwidth.

Solution 1Recommended

Pause Sync, Update OneDrive, and Resume

Refreshing the synchronization session and ensuring the client is running the latest version can resolve temporary processing hangups.

A common cause of slow uploads is a stalled sync engine or an outdated OneDrive client.

Pausing and resuming forces OneDrive to re-evaluate the upload queue, often clearing minor bugs.

Pause syncing

Click the OneDrive cloud icon in your system tray, click the 'Help & Settings' gear icon, and select 'Pause syncing' for 2 hours.

Update the client

Navigate to Settings > About within the OneDrive menu to check for updates. If a newer version is available, download and install it.

Resume syncing

Open the 'Help & Settings' menu again and click 'Resume syncing' to restart the upload process.

Solution 2

Upload in Smaller Batches via Wired Connection

Breaking the 45,000 files into smaller chunks reduces indexing overhead, while a wired connection ensures maximum network stability.

Solution 3

Exclude OneDrive from Antivirus and Firewall Scans

Security software actively scanning each of the 45,000 files during the upload process can severely bottleneck your transfer speeds.

Free Microsoft Office alternative

Experience Faster Document Workflows with WPS Office

If you are tired of dealing with slow synchronization speeds and heavy software overhead, try WPS Office. It is a lightweight, free alternative to Microsoft Office that comes with integrated, fast-syncing cloud storage, making document management incredibly efficient.

1. Download the software: Visit the official WPS Office website and click the free download button for your operating system.
2. Install and launch: Run the lightweight installer and open the WPS Office desktop application.
3. Sign in to activate cloud sync: Create a free account to instantly activate your 1 GB of WPS Cloud storage and enjoy fast document synchronization.

Fully compatible with Microsoft Office formats, including Word (.docx), Excel (.xlsx), and PowerPoint (.pptx).Includes 1 GB of free, fast-syncing WPS Cloud storage dedicated to your documents.Lightweight application size ensures lightning-fast installation and minimal system resource usage.All-in-one suite design lets you manage documents, spreadsheets, and PDFs without jumping between heavy apps.

microsoft office alternative - wps office

Frequently Asked Questions

Why do small files upload so much slower than large files?

Every individual file, regardless of its size, requires OneDrive to process metadata, allocate server space, and verify the upload. Uploading 45,000 small files creates massive per-file processing overhead, which takes significantly more time than uploading a single large file of the exact same total size.

Is there a file size limit for uploading to OneDrive?

Yes, an individual file cannot exceed 250 GB when uploading to OneDrive. While you can upload a total of 250 GB across multiple files, no single item can breach that limit.

Does zipping files speed up OneDrive uploads?

Yes. By compressing thousands of small files into a single ZIP archive, you reduce the total number of files OneDrive needs to index and process from thousands down to one. This bypasses the metadata overhead and allows your upload to proceed at your network's maximum speed.

How can I make OneDrive use my full upload bandwidth?

Click the OneDrive icon in your taskbar, open Settings, and navigate to the Network or Sync and backup tab. Under the Network section, ensure both the Upload and Download rate limits are set to 'Don't limit'.

Document & File Issues