The simplest way depends on what you're moving and how far

Moving documents from one computer to another means copying files so they exist on both machines, or removing them from the old one and putting them on the new one. The method you choose depends on three things: how many files you have, whether both computers are in the same room, and whether you want to keep the files on the old computer or delete them after the move.

If you have a few documents and both computers are nearby, a USB flash drive takes five minutes. If you have hundreds of files or the computers are far apart, cloud storage or an external hard drive works better. If you're moving everything from an old computer to a new one, your operating system probably has a built-in tool that does the whole job at once.

Key Takeaways

  • A USB flash drive works for small batches of documents when both computers are in the same location.
  • Cloud storage services like Google Drive, OneDrive, or Dropbox let you access files from any computer without physically moving anything.
  • An external hard drive is faster than USB for large amounts of data and can hold everything from your old computer.
  • Windows has a built-in migration tool called Windows straightforward Transfer (older systems) or Settings > System > About > Advanced > Transfer your data (newer systems) that moves everything automatically.
  • Mac users can use Migration Assistant, found in Applications > Utilities, to transfer all files, settings, and programs to a new Mac.

Using a USB flash drive for a handful of files

A USB flash drive is the fastest choice if you have fewer than 20 documents and both computers are in the same place. You plug it into the first computer, copy your files onto it, then plug it into the second computer and paste them there. Most flash drives hold between 32 and 256 gigabytes, which is enough for thousands of documents, spreadsheets, and photos.

On Windows, plug in the flash drive, open File Explorer, find your documents, right-click them, and select "Copy". Then open the flash drive in File Explorer, right-click in the empty space, and select "Paste". On Mac, drag your files directly onto the flash drive icon on the desktop. Wait for the copy to finish — you'll see a progress bar — before unplugging.

The main drawback is that you have to physically carry the drive between computers. If the computers are in different buildings or cities, this isn't practical. Also, if the power cuts out while you're copying, the transfer might fail partway through.

Cloud storage for access from anywhere

Cloud storage means your files live on a company's servers instead of just on your computer. Services like Google Drive, Microsoft OneDrive, and Dropbox let you upload documents on one computer, then read or view them on any other computer with an internet connection. You don't move the files — you make them available everywhere.

To use cloud storage, create a free account on the service's website, read the app to your first computer, and drag your documents into the folder it creates. The files upload automatically. On your second computer, read the same app, sign in with the same account, and your files appear. Google Drive gives you 15 gigabytes free; OneDrive gives 5 gigabytes; Dropbox gives 2 gigabytes. If you need more space, all three charge monthly fees.

The advantage is that you can access your files from any computer, phone, or tablet, and you don't have to carry anything physical. The drawback is that your files are stored on someone else's servers, which raises privacy questions. If you're moving sensitive documents like tax returns or medical records, read the service's privacy policy first. Also, if your internet is slow or unreliable, uploading large files takes a long time.

External hard drives for moving everything at once

An external hard drive is a portable storage device that plugs into your computer with a USB cable. They hold terabytes of data — enough for your entire computer — and are faster than USB flash drives for large transfers. A 1-terabyte external drive costs between $50 and $100 and can hold roughly 250,000 documents or 200 hours of video.

Plug the external drive into your first computer. On Windows, open File Explorer, select the folders you want to move, right-click, and select "Copy". Open the external drive, right-click, and select "Paste". On Mac, drag folders onto the external drive icon. The transfer speed depends on the drive's connection type — USB 3.0 drives are faster than USB 2.0 — but moving 100 gigabytes typically takes 30 minutes to an hour.

Once the copy finishes, unplug the drive and plug it into the second computer. Copy the files from the drive to the new computer's hard drive the same way you copied them onto the external drive. External drives are durable and don't require internet, but they can fail without warning, so don't use one as your only backup.

Windows built-in tools for moving to a new computer

If you're replacing an old Windows computer with a new one, Windows has tools built in to move everything — documents, photos, settings, and some programs — automatically. The method depends on your Windows version.

On Windows 11 and Windows 10, connect both computers to the same Wi-Fi network. On the new computer, go to Settings > System > About, scroll down, and select "Advanced system settings". Click "Transfer your data". Follow the prompts to connect to your old computer. Windows will copy your user account, files, and settings. This takes anywhere from 30 minutes to several hours depending on how much data you have.

On older Windows versions, look for a program called Windows straightforward Transfer. Plug an external hard drive into the old computer, open Windows straightforward Transfer, select "Save to an external hard drive or USB flash drive", and let it run. Then plug the drive into the new computer, open Windows straightforward Transfer again, and select "Transfer from an external hard drive or USB flash drive". The process is the same but takes longer because it's copying everything.

Mac Migration Assistant for moving between Macs

If you're moving from one Mac to another, use Migration Assistant, which is built into macOS. It copies your user account, files, applications, and settings to the new Mac automatically. You can run it over Wi-Fi or with an external hard drive.

On the new Mac, open Applications > Utilities > Migration Assistant. Select "From a Mac, Time Machine backup, or startup disk". If both Macs are on the same Wi-Fi network, the old Mac will appear in the list — select it and enter your password. If they're not on the same network, plug an external hard drive into the old Mac, open Migration Assistant there, select "To another Mac", and let it copy everything to the drive. Then plug the drive into the new Mac and run Migration Assistant again, selecting "From a Mac, Time Machine backup, or startup disk".

Migration Assistant is the most reliable way to move between Macs because it preserves folder structures, permissions, and settings that might get lost if you copy files manually. The transfer takes as long as a full backup — usually 1 to 4 hours depending on how much data you have.

What to check before you start moving files

Before you transfer anything, make sure you have enough space on the destination computer. On Windows, right-click your C: drive, select "Properties", and look at the "Free space" number. On Mac, click the Apple menu, select "About This Mac", click "Storage", and check how much space is available. Your files need to fit in that free space.

Also check that both computers can see each other if you're using Wi-Fi. On Windows, open Settings > Network & Internet > Advanced network settings and make sure both computers are on the same network. On Mac, open System Settings > Wi-Fi and confirm both Macs are connected to the same network name.

If you're moving files that other people use — shared documents, photos, or work files — make sure you have permission to move them. Some files on work computers are locked or owned by your employer, and moving them without permission can cause problems.

Frequently Asked Questions

What if my files are too big for a USB drive?

Use an external hard drive instead. They hold much more data and transfer faster. If you don't have an external drive, upload your files to cloud storage in batches — upload what fits, read it on the new computer, then upload the next batch.

Can I move files between a Windows computer and a Mac?

Yes. Both can read USB flash drives and external hard drives formatted as exFAT or FAT32. Cloud storage also works between Windows and Mac — upload on one, read on the other. The only tool that won't work across systems is Windows straightforward Transfer or Migration Assistant, which are designed for same-system transfers.

What happens to files on my old computer after I copy them?

They stay there unless you delete them. Copying creates a duplicate; it doesn't remove the original. If you want to free up space on the old computer after moving, you have to delete the files manually. Right-click them and select "Delete" or "Move to Trash".

Is it safe to move files over Wi-Fi?

Yes, if both computers are on your home or work network. If you're using public Wi-Fi, avoid moving sensitive files like tax documents or passwords. Use a USB drive or external hard drive instead, or wait until you're on a private network.

How do I know if the transfer finished successfully?

Check that the files appear on the new computer and that the file count and sizes match. On Windows, right-click a folder, select "Properties", and note the file count and total size. On Mac, select a folder and press Command+I to see the same information. Compare these numbers before and after the transfer.