OneDrive File Issues

Why Does a Downloaded OneDrive Folder Appear Smaller Than Its Files?

Huda Qurayshi Sep 30, 2026 868 views

Question details

A downloaded OneDrive folder appears significantly smaller in size compared to the combined size of the original files stored in the cloud.

Why Does a Downloaded OneDrive Folder Appear Smaller Than Its Files?

Product: OneDrive
Device & OS: not provided
Scenario: Downloading a folder containing multiple files (exceeding 1 GB) from OneDrive to local storage.
Observed behavior: The downloaded folder has a much smaller file size than the original files on OneDrive.

Before you start

Ensure that your download process has finished completely and locate the downloaded file in your computer's default downloads directory.

Solution 1Recommended

Extract the Downloaded ZIP Archive

OneDrive automatically compresses downloaded folders into a ZIP file to save bandwidth, which reduces the file size temporarily.

Locate the downloaded file

Navigate to your computer's 'Downloads' folder and find the OneDrive file, which will be saved with a '.zip' extension.

Extract the ZIP contents

Right-click the ZIP archive and select 'Extract All' on Windows, or double-click the file if you are using a Mac to unzip it.

Verify the extracted folder size

Right-click the newly extracted folder, select 'Properties' (Windows) or 'Get Info' (Mac), and confirm that the uncompressed size matches your original files.

Compression Explained: ZIP archives compress data so downloads finish faster. Once extracted, your files will return to their normal size and original quality.

Solution 2

Account for Missing File Version History

OneDrive does not include previous file versions when you download files in bulk, which accounts for a portion of the size reduction.

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Frequently Asked Questions

Why does OneDrive download folders as ZIP files?

OneDrive automatically compresses multiple files or entire folders into a single ZIP archive to reduce the total download size and speed up the transfer process over the internet.

Are my files losing quality when downloaded from OneDrive?

No, the ZIP compression used by OneDrive is lossless. Once you extract the ZIP file on your computer, your documents, photos, and videos will be restored to their original quality and size.

How do I download files from OneDrive without them being zipped?

To avoid ZIP compression, you must download files individually rather than selecting a folder or multiple files at once. Alternatively, use the OneDrive desktop sync app to sync folders directly to your local file explorer without manual zipping.

Document & File Issues