How To Send Large File Via Outlook

Outlook imposes a 20 to 25 MB limit on email attachments, but you can bypass this restriction using OneDrive. If you’ve ever wondered how to send large file via outlook without hitting that frustrating cap, you’re in the right place. This guide walks you through every method, from built-in cloud storage to third-party tools, ensuring your big files reach their destination.

Large files are common today—think videos, high-res images, or massive presentations. Sending them through Outlook doesn’t have to be a headache. Let’s break down the simplest, most reliable ways to get the job done.

Before diving into specific steps, understand that Outlook’s attachment limit is a safety measure. It prevents servers from getting clogged. But when you need to share something bigger, you have options. The most seamless method involves OneDrive, which is integrated right into Outlook.

Method 1: Using OneDrive Integration

This is the easiest way for most users. OneDrive is built into Microsoft 365, and Outlook can automatically upload your file there.

Open a new email in Outlook.
Click the “Attach File” button (the paperclip icon).
Select “Browse This PC” or “Browse Web Locations.”
Choose your large file. If it’s over 20 MB, Outlook will prompt you to upload it to OneDrive instead of attaching it directly.
Click “Upload to OneDrive” when the prompt appears.
Outlook will insert a link to the file in your email body. The recipient clicks the link to download it.
Set permissions: You can choose “Recipients can edit” or “Recipients can view only.” This controls who can change the file.
Send the email as usual.

That’s it. The recipient doesn’t need a OneDrive account to download the file. They just click the link. This method works for files up to 250 GB (depending on your OneDrive storage plan).

Method 2: Manually Uploading To OneDrive First

If you prefer to control the upload separately, you can do it manually. This is useful if you want to organize files in specific folders.

Go to onedrive.live.com and sign in with your Microsoft account.
Click “Upload” and select your large file.
Wait for the upload to finish.
In Outlook, compose a new email.
Click “Attach File” > “Browse Web Locations” > “OneDrive.”
Navigate to the file you just uploaded and select it.
Outlook will insert a share link. Choose permission settings.
Send the email.

This method gives you more control over file organization. You can also share folders this way, which is great for multiple files.

Method 3: Compressing The File

Sometimes a file is just slightly over the limit. Compressing it can bring it under 20 MB. This works best for documents and spreadsheets.

Right-click the file on your computer.
Select “Send to” > “Compressed (zipped) folder.”
Windows creates a .zip file. Check its size.
If it’s under 20 MB, attach it directly to your Outlook email.
If it’s still too large, try splitting the zip into smaller parts using a tool like 7-Zip.

Compression doesn’t work well for media files like videos or images. Those formats are already compressed. For those, stick with OneDrive.

Method 4: Using A Third-Party File Transfer Service

If you don’t have OneDrive or need to send files larger than 250 GB, third-party services are a good backup. Services like WeTransfer, Dropbox, or Google Drive work with Outlook.

Upload your file to a service like WeTransfer (free up to 2 GB).
Get the shareable link from the service.
In Outlook, compose a new email.
Paste the link into the email body.
Add a brief message and send.

Be cautious with free services. They often have expiration dates for links. Paid plans offer longer storage and more security. Always check the privacy policy if the file is sensitive.

Method 5: Splitting The File Into Parts

For very large files, you can split them into smaller chunks. Each chunk must be under 20 MB. Then attach each part to separate emails.

Use a file splitter tool like WinRAR or 7-Zip.
Set the split size to 15 MB (to stay under the limit).
The tool creates multiple files, like “file.part1.rar”, “file.part2.rar”, etc.
Send each part in a separate Outlook email. Label the subject clearly, like “Project File – Part 1 of 4.”
The recipient must combine the parts using the same tool.

This method is tedious but works if you have no other options. It’s not ideal for recipients who aren’t tech-savvy.

Common Issues And Solutions

Even with these methods, you might run into problems. Here are frequent hiccups and how to fix them.

Issue: OneDrive Link Not Working

Sometimes the recipient can’t open the link. This usually happens due to permissions.

Check that you set permissions to “Anyone with the link can view.”
Ensure the file isn’t in a restricted folder.
Ask the recipient to sign in with a Microsoft account if needed.

Issue: File Too Large For OneDrive

OneDrive has a file size limit of 250 GB for individual files. If your file exceeds this, you need a different approach.

Use a dedicated file transfer service like Aspera or Signiant.
Consider using a physical drive for extremely large files.
Split the file into multiple OneDrive uploads.

Issue: Outlook Crashes When Attaching

If Outlook freezes or crashes, the file might be corrupt or too large for the system to handle.

Close Outlook and restart your computer.
Try attaching a smaller file first to test.
Use the OneDrive method instead of direct attachment.

Best Practices For Sending Large Files

To make the process smooth for everyone, follow these tips.

Always compress files when possible. It saves bandwidth and time.
Use descriptive file names. Avoid spaces and special characters.
Set expiration dates on links if the file is sensitive.
Notify the recipient before sending a large file. They might have download limits.
Test the link yourself before sending. Click it to ensure it works.
For confidential files, use password protection or encrypted links.

Comparing Methods: Which One Is Best?

Different situations call for different methods. Here’s a quick comparison.

Method	Max File Size	Ease of Use	Best For
OneDrive Integration	250 GB	Very Easy	Most users, Microsoft 365 subscribers
Manual OneDrive Upload	250 GB	Easy	Organized file management
Compression	Under 20 MB	Easy	Documents, spreadsheets
Third-Party Services	Varies (up to 20 GB free)	Moderate	Non-Microsoft users, very large files
Splitting Files	Unlimited	Hard	Last resort, tech-savvy recipients

For 90% of cases, the OneDrive integration is your best bet. It’s built-in, secure, and simple. Only use other methods if OneDrive isn’t available or the file is too large.

Security Considerations

Sending large files often means sending sensitive data. Keep these security points in mind.

OneDrive links can be set to expire. Use this for temporary access.
Never send passwords in the same email as the link.
Use “View Only” permissions to prevent editing.
For highly confidential files, consider encrypted email services.
Check your organization’s policy on file sharing. Some companies block external links.

What If You Don’t Have OneDrive?

If you’re using a free Outlook account (like Outlook.com), you still have OneDrive storage. It’s included with your Microsoft account. Free users get 5 GB of storage. If you need more, you can upgrade to Microsoft 365 for 1 TB.

Alternatively, use a free third-party service like WeTransfer (up to 2 GB) or Google Drive (15 GB free). Just paste the link into your Outlook email.

Step-By-Step: Sending A Video File

Videos are the most common large files. Here’s a specific walkthrough for sending a 500 MB video.

Open Outlook and start a new email.
Click “Attach File” and select your video.
Outlook will say “This file is too large. Upload to OneDrive?”
Click “Upload to OneDrive.”
Wait for the upload. It might take a few minutes depending on your internet speed.
Set permissions to “Recipients can view only.”
Add a note: “Here’s the video. Click the link to download.”
Send the email.

The recipient will get a link. They can stream the video directly from OneDrive or download it. No special software needed.

Troubleshooting Common Errors

Sometimes things go wrong. Here are fixes for frequent errors.

Error: “File Exceeds Attachment Limit”

This means you tried to attach directly. Use OneDrive instead.

Error: “OneDrive Storage Full”

Free up space by deleting old files or upgrade your plan.

Error: “Link Expired”

Set a longer expiration or no expiration for the link.

Error: “Recipient Can’t Download”

Check if they have a firewall blocking the download. Suggest they try a different browser.

Frequently Asked Questions

Can I send a 100 MB file via Outlook?

Yes, but not as a direct attachment. Use OneDrive integration or a third-party link. Outlook will automatically prompt you to upload to OneDrive when the file exceeds 20 MB.

Does the recipient need a Microsoft account to download from OneDrive?

No. They can download the file without signing in, as long as you set permissions to “Anyone with the link.” If you restrict to specific people, they need to sign in.

What is the maximum file size for OneDrive in Outlook?

Individual files can be up to 250 GB. Your total OneDrive storage depends on your plan (5 GB free, 1 TB with Microsoft 365).

Can I send multiple large files in one email?

Yes. You can attach multiple files to OneDrive. Each file can be up to 250 GB. Outlook will create a share link for the entire folder or individual files.

Is it safe to send sensitive files via OneDrive link?

Yes, if you use proper permissions. Set the link to “View Only” and add an expiration date. For extra security, use password protection (available in some Microsoft 365 plans).

Final Thoughts

Sending large files through Outlook doesn’t have to be complicated. The built-in OneDrive method is your best friend. It’s secure, easy, and works for files up to 250 GB. If you don’t have OneDrive, third-party services like WeTransfer or Google Drive are good alternatives. Just remember to compress files when possible and always check permissions for sensitive data.

Now you know exactly how to send large file via outlook without frustration. Next time you need to share a big presentation or video, follow these steps. Your recipients will thank you for the smooth experience.

One last tip: always test your link before sending. A quick click ensures everything works. Happy sending!