The quickest way depends on how many files you have and whether the computers are in the same room

If both computers are on the same network and you just need to move a few folders, a direct network connection is fastest — you can drag files from one machine to the other without any cables or external drives. If the computers are far apart, don't have a network set up, or you're moving a large amount of data, an external drive or USB stick is more practical. Cloud storage works well for smaller batches of files but can be slow for gigabytes of data and requires internet on both ends.

The method you choose also depends on what's on the files — some approaches are more secure than others if you're transferring sensitive documents or financial records. This guide covers the main routes: network transfer, external storage, cloud services, and cable connections. Each has real trade-offs in speed, convenience, and what you need to own or set up beforehand.

Key Takeaways

  • Network transfer is fastest for files on the same Wi-Fi or Ethernet, but requires both computers to be set up to share folders.
  • An external hard drive or USB stick works offline and is practical for large amounts of data, but requires physically moving the drive between machines.
  • Cloud storage (Google Drive, OneDrive, Dropbox) is convenient for smaller files but uploads and downloads take time based on your internet speed.
  • A direct cable connection between computers is rare on modern machines but works when other methods aren't available.
  • Windows and Mac handle file sharing differently, so the steps change depending on which operating systems you're moving between.

Network transfer: the fastest method if both computers are connected

If both computers are plugged into the same router or on the same Wi-Fi network, you can set up one computer to share a folder and access it from the other. On Windows, right-click the folder you want to transfer, select "Share with," then choose "Specific people." Add the username of the person using the other computer, set the permission level (usually "Read/Write" so they can copy files), and click "Share." The other computer can then open File Explorer, click "Network," find the first computer by name, and browse directly to that shared folder.

On Mac, open System Settings, go to "General," then "Sharing," and turn on "File Sharing." Click the plus sign to add the folder you want to share. The other Mac can open Finder, click "Network" in the sidebar, double-click the first computer, and enter its username and password when prompted. Once connected, you can drag files between the two machines as if they were on the same drive.

Network transfer is fastest because files move at your local network speed, which is typically much faster than internet upload and download speeds. The downside is that both computers must be on and connected at the same time, and you need to know the username of the account on the other machine. If either computer is behind a firewall that blocks file sharing, you may need to adjust security settings in Windows Defender or macOS's firewall.

External hard drive or USB stick: practical for large files and offline transfer

Plug an external drive or USB stick into the first computer, copy the files you want to move onto it, then physically carry the drive to the second computer and copy the files again. This method works regardless of network setup, internet speed, or whether the computers are in the same building. It's also the most reliable way to move very large files — a 500 GB external drive can hold more data than most cloud services make practical to upload in a single session.

The main limitation is speed of the drive itself. A standard USB 3.0 external drive transfers at roughly 100 to 150 megabytes per second, while a newer USB 3.1 or Thunderbolt drive can be faster. If you're moving hundreds of gigabytes, even a fast drive takes hours. For smaller jobs — a few folders of documents or photos — an external drive is usually faster than uploading to the cloud and downloading on the other end.

Make sure the external drive is formatted in a way both computers can read. Windows and Mac can both read drives formatted as exFAT, which is the safest choice if you're moving between the two systems. If both computers are Windows, NTFS works fine. If both are Mac, APFS or Mac OS Extended also work, but neither can be read by Windows without extra software.

Cloud storage: convenient for smaller files and ongoing access

Upload files to Google Drive, Microsoft OneDrive, Dropbox, or a similar service on the first computer, then download them on the second. This works from anywhere with internet and doesn't require any cables or setup. You can also share a folder between the two computers so files stay in sync automatically — any change on one machine appears on the other within seconds.

The trade-off is speed. Uploading and downloading depend on your internet connection, not your local network. A 10 GB folder might take 30 minutes to upload on a typical home internet connection, then another 30 minutes to download on the other end. For files under a few gigabytes, cloud storage is usually fast enough. For larger transfers, an external drive is more practical.

Most cloud services offer free storage in the range of 5 to 15 gigabytes. If you need to move more than that, you either pay for extra storage, use multiple free accounts, or split the transfer into batches. One advantage of cloud storage is that you can access the files from any computer with internet, not just the two you're transferring between.

Direct cable connection: a backup method for older or isolated computers

Some older computers have Ethernet ports or serial connections that allow a direct cable link between two machines. Modern laptops rarely have these ports, but if both computers have them, you can connect them with a crossover Ethernet cable (or a regular Ethernet cable with some newer systems that auto-detect). Once connected, the computers see each other as a small network and can share files the same way they would over Wi-Fi.

This method is uncommon now because most file transfers happen over existing networks or the internet. It's useful mainly if one or both computers don't have Wi-Fi, the network is down, or you need to transfer files without connecting to the internet. Setting up a direct connection requires going into network settings on both machines, which varies by operating system and is more complex than the other methods.

Transferring between Windows and Mac: what changes

Windows and Mac can share files over a network, but the setup is slightly different. A Windows computer can see a Mac's shared folder if you turn on file sharing in Mac's System Settings and the Windows computer has the Mac's username and password. A Mac can see a Windows computer's shared folder if Windows file sharing is enabled and the Mac has the Windows username and password.

For external drives, use exFAT format so both systems can read and write to it. Cloud storage is the easiest cross-platform method because both Windows and Mac have the same apps (Google Drive, OneDrive, Dropbox) and they work identically. If you're moving a large amount of data between Windows and Mac, an external exFAT drive is usually faster and simpler than trying to set up network sharing.

What to do if files are too large for your chosen method

If a single file is larger than your USB stick or external drive has space for, compress it first. On Windows, right-click the file, select "Send to," then "Compressed (zipped) folder." On Mac, right-click and select "Compress." Compression reduces file size by 10 to 50 percent depending on the file type — documents compress well, but photos and videos compress very little. After transfer, decompress the file on the other computer by double-clicking it.

If compression doesn't help enough, split the files into smaller groups and transfer them in batches using your chosen method. For very large transfers (terabytes of data), cloud storage and external drives both become impractical, and you may need to rent a faster connection or use a service that specializes in large file transfers.

Frequently Asked Questions

Can I transfer files while using both computers at the same time?

Yes, with network transfer and cloud storage. Both computers can stay on and in use — files copy in the background. With an external drive, you have to physically move it between machines, so you can't use both at once during the transfer itself.

What if I don't know the username of the other computer?

On Windows, right-click "This PC" and select "Properties" to see the computer name. On Mac, open System Settings and look under "General" for the computer name. You can also ask the person using that computer for their username, or use cloud storage instead, which doesn't require usernames.

Is it safe to transfer files over my home network?

Yes, if both computers are yours or belong to people you trust. Files on a home network are only visible to devices connected to your router. If you're transferring sensitive files like financial records or passwords, use a password-protected cloud service or an encrypted external drive instead.

How do I know if my external drive is fast enough?

Check the drive's specifications for its transfer speed, usually listed in megabytes per second. USB 3.0 drives transfer at 100 to 150 MB/s, USB 3.1 at 300+ MB/s. Divide your total file size in megabytes by the transfer speed to estimate how long the copy will take. A 100 GB transfer on a USB 3.0 drive takes roughly 10 to 15 minutes.

Can I transfer files between two computers that have never been connected before?

Yes. Cloud storage is the easiest — both computers just need internet. An external drive works if you have one. Network transfer requires both computers to be on the same network and file sharing to be enabled, which you can set up in a few minutes using the steps above.