Yes, you can move files to another drive, but the method depends on what kind of drive you're adding and what you're moving
Moving files from your main hard drive to a second drive is straightforward if you're adding external storage or a second internal drive to your computer. You can drag and drop files, use copy-and-paste, or let backup software handle it automatically. The catch: moving your operating system or program files usually requires reinstalling, not just dragging folders around. And if you're trying to move everything at once to replace a failing drive, you need a different approach than moving a few folders of photos.
The real question isn't whether you can move files—you can—but whether moving them will break anything that depends on where they live right now.
Key Takeaways
- Personal files like documents, photos, and videos move freely between drives with no setup required, but program files and Windows itself usually need to stay where they are or be reinstalled.
- External drives and internal secondary drives both work for storage, but external drives are slower and may disconnect, while internal drives are faster but require opening your computer.
- Moving files one folder at a time works fine for selective transfers, but replacing your main drive entirely requires disk cloning software or a fresh Windows installation.
- Some programs store settings and data in hidden folders that won't move with the program files, so moving just the program folder often leaves the program broken.
What you can safely move without breaking anything
Personal files move without any risk: photos, videos, documents, spreadsheets, music, downloads, anything you created or downloaded yourself. These files have no dependencies. You can move them by selecting them in File Explorer, right-clicking, choosing "Cut," navigating to your second drive, and pasting. Or drag them directly from one window to another. Both methods work identically.
The same applies to folders you've organized yourself. If you have a folder called "Tax Returns 2020" or "House Renovation Photos," move the entire folder at once rather than file by file—it's faster and you won't accidentally leave anything behind.
Game save files, browser bookmarks exported as HTML files, and archived email backups all move safely too. Anything that's just data sitting in a folder, with no program actively managing where it lives, can move without consequences.
What should stay on your main drive or get reinstalled
Windows itself must stay on your main drive. You cannot move your operating system to a second drive by dragging it. If you want Windows on a different physical drive, you need to either clone your entire main drive using specialized software, or do a fresh Windows installation on the new drive.
Program files are trickier. Moving a program's folder to another drive usually breaks the program because Windows stores information about where programs live in the registry—a database that only Windows reads. When you move the folder, Windows still looks for the program in the old location. Some programs will still launch if you move them, but many won't, and even the ones that do may lose settings or stop working correctly.
The safe approach: uninstall the program from your main drive using "Add or Remove Programs" in Windows Settings, then reinstall it on your second drive. This tells Windows where the program actually is. It takes longer than moving a folder, but it works reliably.
Moving files to an external drive versus a second internal drive
External drives (USB, Thunderbolt, or docking stations) are easier to install—you just plug them in—but they're slower than internal drives and can disconnect if the cable comes loose or the power fails mid-transfer. They're best for backups, archival storage, or files you access occasionally.
A second internal drive (SATA or NVMe, depending on your computer) stays connected and transfers files much faster. It's better if you're moving large video files, photo libraries, or anything you access regularly. The trade-off: you have to open your computer case to install it, which takes 15 to 30 minutes if you've never done it before. If you're uncomfortable opening your computer, an external drive is the simpler choice even if it's slower.
You can use both. Many people keep an external drive for backups and a second internal drive for active storage of large files.
How to move your entire drive to a new one
If your main drive is failing or you're upgrading to a larger drive and want to keep everything exactly as it is, you need disk cloning, not file moving. Cloning copies your entire drive—Windows, programs, settings, files, everything—to a new drive so your computer boots and runs identically on the new hardware.
Free cloning software includes Macrium Reflect (free version), EaseUS Todo Backup (free version), and AOMEI Backupper Standard. You install the software on your current computer, connect the new drive (usually via a USB adapter), select your current drive as the source and the new drive as the destination, and let it run. The process takes 30 minutes to several hours depending on how much data you have.
After cloning finishes, you shut down, physically swap the drives (or remove the old one and keep the new one as your main drive), and boot up. Your computer should start exactly as before. This is different from moving files—it's a complete duplication of your entire drive.
Moving files when your drive is almost full
If your main drive is running out of space, moving large files to a second drive frees up room when ready. Start with your largest folders: typically "Documents," "Downloads," "Pictures," and "Videos" in your user folder. Right-click each folder, choose "Cut," navigate to your second drive, and paste.
After moving, Windows may still show the old folder location in your sidebar. You can delete the empty folder or leave it—it takes up no space once it's empty. Some people create shortcuts to the moved folders on their main drive so they're straightforward to find, but that's optional.
Do not move your "AppData" folder or "Program Files" folder. These contain program settings and installations that depend on being in specific locations. Move only your personal files and media.
What happens if you move a file and then can't find it
If you moved a file and now can't locate it, check that your second drive is still connected and showing up in File Explorer. If it is, navigate to the drive and look for the folder you moved. If the drive isn't showing, it may have disconnected (if external) or failed (if internal).
If you moved a program folder and the program no longer works, uninstall it using "Add or Remove Programs" and reinstall it on your main drive. This is faster than troubleshooting why the moved version broke.
If you accidentally moved a file you needed on your main drive, check your Recycle Bin—if you used "Cut" and "Paste," the file moved rather than copied, so it won't be in Recycle Bin. But if you used "Copy" and "Paste," the original is still on your main drive. Use File Explorer's search function (magnifying glass icon, top right) to search your main drive for the filename.
Frequently Asked Questions
Can I move my Documents folder to another drive permanently?
Yes. Right-click the Documents folder in File Explorer, select "Properties," go to the "Location" tab, and type the path to your second drive. Windows will move the folder and remember the new location. Any program that saves to "Documents" will now save to your second drive automatically. This works for Downloads, Pictures, and Videos folders too.
What if I move files and my computer won't start?
This usually means you moved something critical like Windows system files or a program your computer needs at startup. If you moved a folder and your computer won't start, connect your main drive to another computer, move the folder back to its original location, and try again. This is why moving only personal files is safer than experimenting with system folders.
Do I need to format a new drive before moving files to it?
If the drive is brand new, yes—most new drives come unformatted. Right-click the drive in File Explorer, select "Format," choose NTFS as the file system, give it a name, and click Start. This takes a few seconds. If the drive already has files on it and you want to keep them, do not format. If you want to erase everything on it first, then format.
Is it faster to move or copy files?
Moving is slightly faster because the computer only writes the file once. Copying writes it twice—once to the new location and once to the old. For a few files the difference is negligible, but for hundreds of gigabytes, moving can save 10 to 20 percent of the time. Use "Cut" and "Paste" to move; use "Copy" and "Paste" to keep the original.
Can I move files between a Windows computer and an external drive I'll use on a Mac?
Yes, but format the external drive as exFAT first, not NTFS. NTFS works on Windows but Macs can only read it, not write to it. exFAT works on both. Right-click the drive, select "Format," choose exFAT, and proceed. After that, you can move files from Windows and access them on a Mac.