The fastest way depends on file size and who you're sending to
Email attachments cap out at 20 to 25 MB on most services, so anything larger needs a different route. For files under 2 GB, cloud storage services like Google Drive, Dropbox, or OneDrive let you upload once and share a link — the recipient downloads at their own pace without clogging either inbox. For files larger than that, or when you need the transfer to happen in one session without cloud storage, dedicated file transfer services like WeTransfer or Tresorit work better. The choice comes down to whether you want the file to stay accessible afterward (cloud storage) or disappear after download (transfer services).
The person receiving the file matters too. If they're not tech-savvy, a cloud storage link with simple download instructions works better than asking them to use an unfamiliar service. If they need the file urgently and your internet is slow, uploading to cloud storage first, then sharing the link, is faster than trying to email it directly.
Key Takeaways
- Cloud storage services like Google Drive and Dropbox work for files up to 2 TB and keep the file accessible indefinitely, but require the recipient to have an account or accept a shared link.
- Dedicated transfer services like WeTransfer let you send files without requiring the recipient to sign up, but the file usually deletes after a set number of days.
- Compressing a file before sending reduces its size by 30 to 70 percent depending on the file type, which can mean the difference between email and needing another method.
- Direct peer-to-peer transfer using Syncthing or Resilio Sync works for very large files on the same network but requires both people to install software.
Using cloud storage to share files you want to keep accessible
Google Drive, Dropbox, OneDrive, and iCloud all work the same way: upload the file to your account, right-click it, select "Share," and send a link to the recipient. They can view or download without needing their own account, depending on what permissions you give them. This method works for files of any size up to your storage limit (usually 100 GB to 2 TB depending on your plan), and the file stays there as long as you want it to.
The main limitation is speed — uploading a 5 GB file on a typical home internet connection takes 20 to 40 minutes. If you're in a hurry, start the upload, then send the recipient a message saying it's on the way. Most services show a progress bar so you know when the upload finishes and the link becomes active.
For Google Drive specifically: open drive.google.com, click the "New" button on the left, select "File upload," choose your file, wait for it to finish, right-click the file name, click "Share," and paste the link into an email or message. For Dropbox: open dropbox.com, click "Upload files," select your file, right-click it when it finishes, click "Share," and copy the link. OneDrive works the same way through onedrive.live.com.
Using transfer services when the recipient doesn't need long-term access
WeTransfer, Tresorit, and similar services let you upload a file and generate a download link without requiring the recipient to create an account. The file typically stays available for 7 to 14 days, then deletes automatically. This works well for one-off transfers — sending a video to a friend, sharing a large document with a client for review, or getting a file to someone who doesn't use cloud storage.
WeTransfer is the simplest: go to wetransfer.com, click "Add your files," select your file, enter the recipient's email address, and click "Transfer." The service uploads your file and emails them a download link. Tresorit (tresorit.com) is similar but encrypts the file during transfer, which matters if you're sending sensitive information. Both services have free versions with file size limits (WeTransfer allows up to 2 GB free, Tresorit up to 5 GB), and paid plans if you need to send larger files regularly.
The upload speed is the same as cloud storage — a 5 GB file still takes 20 to 40 minutes on typical home internet. The advantage is that you don't need to manage the file afterward; it vanishes on its own.
Compressing files to make them smaller before sending
Before uploading anything, check whether compressing it will help. Video files, photos, and audio compress poorly because they're already compressed. Documents, spreadsheets, and folders full of text files compress 50 to 70 percent. A folder with 500 MB of Word documents might shrink to 150 MB after compression.
On Windows: right-click the file or folder, select "Send to," then "Compressed (zipped) folder." Windows creates a new .zip file in the same location. On Mac: right-click the file, select "Compress," and macOS creates a .zip file. On either system, upload the .zip file instead of the original. The recipient unzips it by double-clicking on Windows or Mac — no special software needed.
Compression takes a few seconds to a few minutes depending on file size. If a 500 MB folder compresses to 150 MB, you've cut your upload time from 30 minutes to 9 minutes, which is worth doing if you're in a hurry.
Peer-to-peer transfer for files on the same network
If you and the recipient are on the same Wi-Fi network or connected by Ethernet, peer-to-peer software like Syncthing or Resilio Sync transfers files directly between computers without uploading to the internet. This is much faster — a 10 GB file transfers in 2 to 5 minutes instead of 30 to 60 minutes. The trade-off is that both people need to install the software and set it up, which takes 10 to 15 minutes the first time.
Syncthing (syncthing.net) is free and open-source. Download the installer for your operating system, run it, create an account, and add the other person's device ID (a long string of characters they can copy from their Syncthing window). Once you're connected, you can drag files into a shared folder and they sync instantly to their computer. Resilio Sync (resilio.com) works similarly but is closed-source and has a paid version with extra features.
This method only makes sense if you're transferring files regularly or need to move very large files quickly. For a one-time transfer, the setup time isn't worth it.
Splitting very large files into smaller pieces
Some services have file size limits even though they claim to handle large transfers. If you hit a limit, you can split a file into smaller pieces, send them separately, and the recipient reassembles them. This is tedious but works when nothing else does.
On Windows: use 7-Zip (7-zip.org, free) to split a file. Right-click the file, select "7-Zip," then "Add to archive." In the dialog, find the "Split to volumes, bytes" field and enter a size like 1000000000 (1 GB). 7-Zip creates multiple files named filename.7z.001, filename.7z.002, and so on. Send all of them to the recipient. They open 7-Zip, right-click the first file (.001), select "7-Zip," then "Extract," and 7-Zip reassembles them automatically.
On Mac: use The Unarchiver (theunarchiver.com, free) or the built-in command line. The process is similar but requires opening Terminal and typing a command, which is beyond most users. For Mac, it's usually easier to use a cloud storage service or transfer service instead.
Troubleshooting common problems
If an upload keeps failing, check your internet connection by opening speedtest.net in your browser. If your upload speed is below 1 Mbps, uploads will be very slow or fail. Restart your router (unplug it for 30 seconds, plug it back in) and try again. If the problem persists, try uploading from a different location with better internet, like a coffee shop or library.
If the recipient says they can't download the file, check that you gave them the right permission level. In Google Drive and Dropbox, make sure you selected "Viewer" or "Editor" rather than keeping the link private. If you used a transfer service, confirm that the file hasn't expired — most services delete files after 7 to 14 days. If it has, upload it again and send a new link.
If a file is corrupted after transfer (won't open, shows errors), the upload was interrupted. Try uploading again, or compress the file first to make it smaller and faster to upload. If the problem happens repeatedly, try a different service — sometimes one service's servers are slower or less reliable than another on your connection.
Frequently Asked Questions
What's the difference between cloud storage and a transfer service?
Cloud storage keeps the file on the internet indefinitely so you and the recipient can access it anytime. Transfer services upload the file, generate a download link, and delete the file after a set period (usually 7 to 14 days). Use cloud storage if you both need to access the file later; use a transfer service for one-time sends.
Is it safe to share files through these services?
Cloud storage and transfer services encrypt files in transit (while they're moving) and at rest (while stored). Tresorit adds extra encryption so even the service can't see what you're sending. For truly sensitive files, encrypt them yourself before uploading — use 7-Zip on Windows (set a password in the archive dialog) or Mac's built-in encryption, then upload the encrypted file.
Why is my upload so slow?
Upload speed depends on your internet plan. Most home connections have upload speeds of 5 to 20 Mbps, which means a 1 GB file takes 7 to 27 minutes. If your upload is much slower than that, restart your router or move closer to it. If it's still slow, contact your internet provider — they may be throttling uploads or your connection may have a problem.
Can I send a file to someone without them needing to create an account?
Yes, with transfer services like WeTransfer or Tresorit, or by sharing a cloud storage link. For cloud storage, the recipient doesn't need an account to download — they just click the link and save the file. For transfer services, they don't need an account at all; they click the link and download directly.
What happens if the recipient doesn't download the file in time?
With cloud storage, the file stays there forever unless you delete it. With transfer services, the file deletes automatically after 7 to 14 days. If the recipient misses the window, you upload it again and send a new link. For important files, use cloud storage so there's no time pressure.