If you are having trouble uploading files or folders, please try the following troubleshooting steps:
- Please ensure your web browser is the latest version of Chrome, Firefox, Safari, or Edge
- Try clearing your browser's cache. If this does not resolve your issue, please proceed to the next step.
- Verify that you are using one of our recommended operating systems.
- Verify that the file's name is valid. Box only supports file or folder names that are 255 characters or less. File names containing non-printable ascii, "/" or "\", names with leading or trailing spaces, and the special names “.” and “..” are also unsupported. Box supports only Unicode Basic Multilingual Plane (BMP) characters in file and folder names.
- Verify that the file or folder's path on Windows machines is under the 255-character Windows limitation. Folder paths that exceed 255 characters may truncate the content's name before uploading to Box.
- Make sure you are uploading files smaller than the maximum for your account type. To determine your maximum, click on your initials in the top-right corner of the page and select Account Settings. Then, click on Account and your Max file size will be listed under Account Details.
- Try uploading using the File upload method instead of Folder upload, or vice versa.
- Please note that Internet Explorer does not support Folder upload, only File upload. If you need to upload folders, please use a different web browser.
- Check your network connection to Box. If connected to the internet with a wireless card, check to see if the connection to the internet drops intermittently. If this is the case, we recommend the Folder upload method.
- Try temporarily disabling or configuring your firewall to allow Box as a trusted site. You may find that your anti-virus software includes a built-in firewall. If you are attempting to access Box from an office setting and experience upload issues, then please contact your IT administrator or internal Help Desk.
- Proxy servers may sometimes cause failed uploads. If you see the error message: An error occurred with the upload. Please refresh the page and try again. Please contact your IT department or Help Desk and ask them to check your proxy configuration.
Potential Causes of Slow Uploads:
Slow upload speeds can have a variety of causes.
Box does not limit, throttle, cap, or shape upload bandwidth for individual files.
Box does perform processing on each file which can impact the total time it takes to complete an upload, particularly when uploading multiple files. But this does not limit the bits/second of your machine's connection to Box.
For more details, please read our Fair Use Policy.
If you find that your upload is taking longer than it should, we have listed a few reasons that may affect upload speeds.
- Firewalls: Firewalls can slow down or block the upload process. If you use third-party software, try temporarily turning off firewalls such as ZoneAlarm, the built-in Windows or Mac firewall, or any others.
- Simply configuring your firewall to allow the Box domains will likely solve this issue.
- Business network restrictions: Users accessing Box from an office setting may find that their IT department has blocked or slowed down connections to Box.
- Try consulting your IT department on restrictions they may have placed on uploads or unapproved web sites.
- You can determine this by leaving your company network (ex. try a coffeeshop with WiFi) and see if the issue persists.
- VPNs may cause your IP address to be misplaced and inadvertently place your computer in another geographic location other than your actual location. This can affect your upload speeds. Ask your network / IT department if a VPN could be changing your actual location on the internet.
- Browser Specific Issues: Try a different browser or computer. Users may find that their upload speeds increase on alternative browsers.
- Device Specific Issues: If your upload speed has not improved after you have tried updating and/or switching internet browsers, please try a different computer to help isolate the issue.
- If your upload speed increases on another computer, then you will know that the first computer itself was causing the slower speed.
- If your speed does not increase, then this is most likely an issue with your internet connection.
- Internet Service Provider: Sometimes slow upload speeds are the fault of your Internet Service Provider.
- We recommend a high-speed internet connection with high upload speeds.
- Often with Cable and DSL, the upload speed is significantly slower than the download speed. This will result in fast loading times for most websites and file downloads, but slow uploads.
A Note on Kilobytes vs. Kilobits:
There is a difference between “Kb” (kilobit) and “KB” (kilobyte). One kilobyte is equal to eight kilobits. Internet service providers (ISP) often calculate and advertise upload and download speeds in terms of “Kbps” (kilobits per second) while Box uploads are calculated in terms of “KBps” (kilobytes per second). Therefore, if you see browser upload speeds of 30 KBps this would be interpreted as 240 Kbps by your ISP.
Bandwidth and Box Endpoints:
Upload speed depends on your network connection and a component of this is bandwidth.
- Bandwidth allowance determines the amount of data that can pass from the Internet to your web browser in a given amount of time.
- A smaller bandwidth results in a longer time that it takes Internet data to transfer on your web browser.
Box offers multiple endpoints to make sure your uploads are taking the most efficient route. See our announcement: Box expands its Global Network Presence