The fastest way depends on file size and who you're sending to
Files larger than 25 MB usually won't go through email. Gmail, Outlook, and most email providers reject anything bigger. For files under 2 GB, cloud storage services like Google Drive, Dropbox, or OneDrive work fastest — you upload once, share a link, and the other person downloads at their own speed. For files larger than 2 GB, you'll need a dedicated file transfer service, an external hard drive, or a direct connection between computers.
The method that works best also depends on whether the person receiving the file is on your local network (same office or home), across the internet, or somewhere in between. A 5 GB video file takes minutes to move between computers in the same room but hours to upload to the cloud and back down again.
Key Takeaways
- Email works only for files under 25 MB; anything larger bounces back or gets rejected before sending.
- Google Drive, Dropbox, and OneDrive are free up to a point and work for files up to 2 GB without paying for storage.
- For files larger than 2 GB, use a dedicated transfer service like WeTransfer, Tresorit, or Synology C2, or hand over an external drive in person.
- If both computers are on the same network, direct file sharing or external drives are faster than uploading to the cloud and back down.
Cloud storage: Google Drive, Dropbox, and OneDrive
These services let you upload a file once and share a link instead of sending the file itself. The person you're sending to clicks the link, downloads the file to their own computer, and you don't have to stay connected while they do it. All three offer free accounts with enough space for most large files.
Google Drive gives you 15 GB free. Dropbox gives you 2 GB free but increases that if you refer friends. OneDrive gives you 5 GB free if you have a Microsoft account. To share a file, upload it to your account, right-click it, select "Share," and paste the link in an email or message. You can set the link to expire after a certain number of days or require a password.
The main drawback is speed: uploading a 1 GB file on a typical home internet connection takes 15 to 30 minutes, and the person receiving it has to read it again on their end. If both of you are on fast business internet, this is usually fine. If either of you has slow internet, a dedicated transfer service or external drive is faster.
Dedicated file transfer services for very large files
Services like WeTransfer, Tresorit, and Synology C2 are built specifically for large files. You upload the file, get a link, and send that link to the recipient. They read it without needing an account. Most of these services are free for files up to 2 GB, with paid plans for larger sizes.
WeTransfer is the simplest: go to wetransfer.com, drag your file into the box, enter the recipient's email address, and it sends them a read link. The file stays available for 7 days. Tresorit and Synology C2 offer more security and longer expiration times but require more setup. For most people, WeTransfer is the fastest route.
These services still require uploading to the internet, so they're not faster than cloud storage for the actual transfer — they're just simpler if you don't want to manage accounts or folders. Use them when you're sending to someone outside your organization or when you want the file to disappear after a set time.
External hard drives and direct computer connections
If you're in the same building or can meet in person, an external hard drive is the fastest option for files larger than 5 GB. Plug the drive into your computer, copy the file to it, unplug it, and hand it to the other person. A 50 GB file that would take hours to upload and read takes minutes to copy to a drive.
External drives cost $50 to $150 depending on capacity and speed. A USB 3.0 drive (the standard now) transfers data at roughly 100 MB per second, so a 100 GB file takes about 15 minutes. Thunderbolt drives are faster but more expensive and only work on newer computers.
If both computers are on the same local network — the same office Wi-Fi or wired connection — you can also share files directly without uploading anywhere. On Windows, right-click a folder, select "Share with," and choose the other computer. On Mac, go to System Preferences, Sharing, and enable File Sharing. This is faster than cloud storage because the data never leaves your network.
When email attachments actually work
Email is still the right choice for files under 25 MB. Most email providers allow attachments up to this size without complaint. If you're sending a document, spreadsheet, or image that's smaller than 25 MB, attach it directly — it's simpler than creating a link and the recipient gets it when ready in their inbox.
Some email providers are stricter: Gmail allows 25 MB, Outlook allows 20 MB, and some corporate email systems allow only 10 MB. If your file is close to the limit and the recipient uses corporate email, use a cloud storage link instead to be safe.
Comparing your options in one table
| Method | File size limit | Speed for 1 GB file | Best for |
|---|---|---|---|
| Email attachment | 10–25 MB | when ready | Documents, images, small files |
| Google Drive / Dropbox / OneDrive | 2 GB free, more with paid plan | 15–30 min upload + recipient read time | Sharing with people who need accounts anyway |
| WeTransfer or similar | 2 GB free, more with paid plan | 15–30 min upload + recipient read time | One-time transfers to anyone |
| External hard drive | Unlimited (depends on drive size) | 5–10 minutes | Large files, same location, no internet needed |
| Direct network sharing | Unlimited | 2–5 minutes (same network) | Offices, homes, same Wi-Fi or wired connection |
What usually goes wrong and how to fix it
The most common problem is the recipient not receiving the link or email. If you're using a cloud service, check that you've set the sharing permissions correctly — sometimes the link is set to "view only" when the person needs to read. If you're using email, the message might have landed in spam; ask the recipient to check their spam folder and mark your email as "not spam."
The second problem is slow uploads. If uploading a file is taking much longer than expected, check your internet speed by going to speedtest.net. If your upload speed is below 5 Mbps, use an external drive or ask if the recipient can pick it up in person. Uploading over Wi-Fi is also slower than a wired connection; plug into ethernet if possible.
The third problem is the file corrupting during transfer. This is rare with modern services, but if you're transferring a very large file (over 10 GB), verify the file after the recipient gets it. Ask them to check the file size matches what you sent, and if it's a video or archive, try opening it. If something went wrong, try again with a different method.
Frequently Asked Questions
Can I send a file larger than 2 GB through Google Drive or Dropbox?
Yes, but you need a paid account. Google Drive's free tier caps at 15 GB total storage, so a single 2 GB file uses a lot of it. Dropbox free is only 2 GB total. Both offer paid plans starting around $2 per month for more space. For one-time transfers of very large files, WeTransfer's paid option or an external drive is usually cheaper.
Is it safe to send files through WeTransfer or similar services?
These services encrypt files in transit and delete them after a set time, so they're reasonably safe for most purposes. If you're sending sensitive documents, use a service that offers password protection or end-to-end encryption, like Tresorit. For highly confidential files, an external drive handed over in person is safest.
Why is my upload so slow even though my internet is fast?
Upload speed is usually much slower than read speed on home internet. A connection that downloads at 100 Mbps might upload at only 10 Mbps. Check your actual upload speed at speedtest.net. If it's below 5 Mbps, use an external drive or ask the recipient to come pick it up. Business internet typically has faster uploads.
What's the difference between uploading to Google Drive and using WeTransfer?
Both require uploading to the internet, so speed is similar. Google Drive is better if you want the file to stay accessible long-term and you already use Google's other services. WeTransfer is simpler for one-time transfers because it requires no account and the file disappears after 7 days, which is useful if you want to avoid clutter.
Can I send a file to someone without them needing to create an account?
Yes. Google Drive, Dropbox, and OneDrive all let you share links that work without an account — the recipient just clicks and downloads. WeTransfer and similar services also work without accounts. External drives and direct network sharing don't require accounts either. Only email attachments require both people to have email addresses.