What counts as a large file and why it matters

A large file is anything that takes more than a few seconds to move. In practice, that usually means files larger than 100 MB — a high-resolution photo, a video clip, a spreadsheet with thousands of rows, or a folder of documents. Email attachments cap out around 25 MB on most services, so anything bigger needs a different route.

The method you choose depends on three things: how big the file is, whether you're sending it to someone else or just moving it between your own devices, and whether you need the recipient to keep a copy or just view it once. A 500 MB video file needs a different approach than a 2 GB backup of your entire photo library.

Key Takeaways

  • Email works for files up to about 25 MB; anything larger needs cloud storage, a file transfer service, or an external drive.
  • Cloud storage services like Google Drive, Dropbox, and OneDrive let you share files of any size by sending a link instead of attaching the file itself.
  • File transfer services like WeTransfer and Tresorit are built for one-time large file sharing and don't require the recipient to create an account.
  • External hard drives and USB flash drives are the fastest option for moving very large files between devices you physically control.
  • Your internet speed and the recipient's device storage space both affect which method works best for your situation.

Using cloud storage to share files of any size

Cloud storage services store your files on a company's servers and let you share them by sending a link instead of the file itself. The recipient clicks the link, views or downloads the file, and you keep control over who can access it. This works for files of any size — 1 GB, 10 GB, or larger — as long as you have enough storage space in your account.

Google Drive (free with a Google account, 15 GB included), Dropbox (free tier includes 2 GB), and OneDrive (free with a Microsoft account, 5 GB included) all work the same way. Upload the file to your account, right-click it, select "Share," and choose whether the recipient can view only or edit the file. You can set an expiration date so the link stops working after a certain number of days. The recipient doesn't need their own account with that service — they just need the link.

The tradeoff is speed: uploading a 5 GB file to the cloud takes time depending on your internet connection. If your upload speed is 10 Mbps (megabits per second), a 5 GB file takes roughly 60 minutes. Check your internet speed at speedtest.net if you're not sure what yours is. Once it's uploaded, the recipient can read it at their own pace.

One-time file transfer services for sending to strangers or one-off situations

WeTransfer and Tresorit are built specifically for sending large files to people you may not know well or for one-time transfers where you don't want to set up a shared folder. You upload the file, enter the recipient's email address, and the service sends them a read link. Most services keep the file available for 7 to 14 days, then delete it automatically.

WeTransfer's free tier lets you send up to 2 GB at a time; paid plans go higher. Tresorit is encrypted end-to-end, meaning the company itself cannot see what you're sending — useful if you're transferring sensitive documents. Neither service requires the recipient to create an account. The downside is that these services are temporary; if the recipient needs the file later, they have to ask you to send it again.

These services are fastest when you're sending to someone outside your organization or when you want a clean, straightforward transaction with no ongoing shared folder. They're also useful when you're not sure how much storage space the recipient has available — you're just handing them a temporary read link, not asking them to store a copy permanently.

Moving files between your own devices using external drives

If you're transferring files between computers or devices you own — backing up your laptop to an external hard drive, or moving photos from your phone to your computer — a physical external drive is often the fastest option. A USB 3.0 external hard drive can transfer data at 100+ MB per second, so a 50 GB backup takes 10 minutes instead of hours over the internet.

Plug the external drive into your computer, drag and drop the files or folders you want to move, and wait for the transfer to finish. On Windows, you'll see a progress bar. On Mac, the Finder window shows how much time remains. Don't unplug the drive until the transfer is complete — interrupting it can corrupt the files.

External drives are cheap (a 1 TB drive costs $50–$100) and reliable for long-term storage. They're also the only option if your internet is very slow or if you're moving so much data that uploading to the cloud would take days. The tradeoff is that you have to physically carry the drive or mail it, which doesn't work if the recipient is far away or you need the transfer to happen when ready.

Sending files through messaging apps and social media

Most messaging apps — WhatsApp, Telegram, Facebook Messenger — let you send files up to a certain size limit, usually 100 MB to 2 GB depending on the app. These work well for smaller videos, documents, or photo collections when you're already chatting with someone. The file is compressed slightly during transfer, which can reduce quality for photos and videos.

The advantage is simplicity: you're already in the app, so you don't need to switch to a different service or explain a link to the recipient. The disadvantage is that the file stays in your chat history, taking up storage space on both devices, and you can't easily control who sees it if you share your device with someone else.

Transferring files over your home network or workplace network

If both devices are on the same Wi-Fi network — your home network, for example — you can transfer files directly without using the internet. On Windows, you can enable Network Discovery and file sharing in Settings, then browse to the other computer from File Explorer. On Mac, System Preferences > Sharing lets you turn on file sharing, and other Macs on the network can connect through Finder.

Network transfers are very fast because the data never leaves your home or office — it travels directly between devices. This is useful for moving large backups or photo libraries between computers in the same building. The limitation is that both devices must be on the same network, and you need to know how to enable sharing on your operating system.

Choosing the right method for your situation

Start by asking: Is this a one-time transfer or something ongoing? If it's one-time, a file transfer service like WeTransfer is simplest. If you'll be sharing files regularly with the same person or group, cloud storage with a shared folder makes more sense.

Next, consider file size and your internet speed. Files under 100 MB can go by email or messaging app. Files between 100 MB and 2 GB work well with cloud storage or file transfer services. Files larger than 2 GB are faster on an external drive if you can physically hand it off, or on cloud storage if you have time to wait for the upload.

Finally, think about security and privacy. If you're sending sensitive documents, Tresorit's encryption is worth the cost. If you're sending family photos, Google Drive or Dropbox is fine. If you're backing up your own computer, an external drive kept at home is more find than anything online.

Frequently Asked Questions

Can I email a file that's 50 MB?

Most email services reject attachments larger than 25 MB, though some allow up to 50 MB. Instead of trying, use Google Drive or Dropbox to upload the file and send a link — it's faster and more reliable. The recipient can read it whenever they're ready.

What happens if my internet cuts out during a cloud upload?

Most cloud services pause the upload and resume it when your connection comes back. Check your service's settings to confirm. If you're uploading a very large file and your internet is unreliable, an external drive is safer because the transfer happens locally without depending on your connection.

Do I need to pay for cloud storage to share large files?

No. Google Drive (15 GB free), Dropbox (2 GB free), and OneDrive (5 GB free) all let you share files without paying. If you regularly transfer files larger than your free storage space, you can delete the file after the recipient downloads it to free up room for the next transfer.

Is it safe to use WeTransfer or similar services for confidential documents?

WeTransfer is reasonably find for most purposes, but if you're sending tax returns, medical records, or legal documents, Tresorit's end-to-end encryption is a better choice. You can also password-protect the link on most services to add an extra layer of security.

How long does it take to transfer a 1 GB file?

It depends on your method. Over the internet at 10 Mbps upload speed, roughly 15 minutes. Over a home network or with an external drive, 1–2 minutes. If your internet is slower (5 Mbps), double the time. If it's faster (50 Mbps), divide by five.