File uploads in MediaLab can fail for several reasons. Below are the most common causes and solutions.

Common Causes

• Firewall restrictions – Corporate firewalls may block large uploads. Contact your IT department.
• Network-attached storage (NAS) – Uploading directly from NAS can cause disruptions. Copy the file to your local computer first.
• Internet connection quality – Unstable connections are the most common cause of upload issues. Use a wired connection instead of Wi-Fi if possible.
• Outdated browser – Ensure your browser is up to date. Check at whatbrowser.org.
• Slow upload speed – If your upload speed is too low for the file size, uploads may fail. See our guide on calculating estimated upload times.
• Corrupted file – Check that the file is not corrupted. Try re-exporting it from your video editor.

Alternative Upload Methods

• Smart routing (accelerated upload) - Improve upload speed and reliability by routing your uploads through our global network of servers. Choose "Accelerated upload" from the Upload menu, then pick "Smart routing". This option is free of charge.
• AWS upload acceleration - Choose "Accelerated upload" from the Upload menu, then pick "AWS upload acceleration" to use Amazon's global network of servers. This option has an additional cost.
• FTP uploads – If problems persist, try FTP. It is better at resuming interrupted uploads. (Available for clients with the Pull add-on enabled.)

Chunked Uploads

MediaLab offers multiple upload methods in addition to the accelerated upload. You can enable chunked uploads in your user preferences. Files are uploaded in smaller parts and reassembled afterward, which improves reliability for large files or unstable connections. Alternatively, you can toggle resumable uploads or entire file uploads to see which method works best for you.