You can install Epic Games titles to a thumb drive, but you need to plan for storage and understand the limitations

Epic Games titles can run from a thumb drive, but the process is not straightforward. Most games are too large to fit on a standard thumb drive — even a 128 GB drive fills up quickly. You will need to either install the game to your computer's main drive and then move it, or use the Epic Games Launcher's built-in relocation feature to point directly to the thumb drive during installation. The thumb drive must be formatted as NTFS (not FAT32), and the game will run slower from a thumb drive than from your computer's internal drive because thumb drives transfer data more slowly than solid-state or hard drives.

This approach works best if you move between computers frequently or want to avoid taking up space on your main drive. For regular play on a single machine, installing to your computer's internal drive will always give you faster load times and smoother performance.

Key Takeaways

  • Most Epic Games titles require 50 GB to 150 GB of space, so you need a large thumb drive and should check the game's storage requirements before starting.
  • Your thumb drive must be formatted as NTFS, not FAT32, because FAT32 cannot handle files larger than 4 GB.
  • The Epic Games Launcher can install directly to a thumb drive if you set the installation location before you start the read.
  • Games run noticeably slower from a thumb drive than from an internal drive, so this method works best for portable access rather than regular play.

Check your game's storage requirements and thumb drive size

Open the Epic Games Launcher and find the game you want to install. Click on it and look for the storage requirement — this is usually listed on the game's store page or in the launcher details. Write down the exact number. Common titles like Fortnite need 90 GB, Unreal Engine 5 projects can need 100 GB or more, and smaller titles like Hades need around 20 GB.

Check your thumb drive's actual usable space by plugging it into your computer, opening File Explorer (Windows) or Finder (Mac), right-clicking the drive, and selecting Properties or Get Info. The usable space is always less than the advertised size — a 128 GB drive typically has around 119 GB available. Subtract 10 percent as a safety buffer, then compare that number to your game's requirement. If the game needs 90 GB and your drive has 107 GB available, you have enough room. If not, you need a larger thumb drive.

Format your thumb drive as NTFS on Windows

Thumb drives often come formatted as FAT32, which cannot store files larger than 4 GB. Most modern games have individual files larger than this, so you must reformat the drive as NTFS. Plug in the thumb drive, open File Explorer, right-click the drive name, and select Format.

A dialog box will appear. Under File System, select NTFS from the dropdown menu. Give the drive a name if you want (something like "Games" is clear). Leave the Allocation Unit Size set to Default. Check the box for Quick Format to speed up the process, then click Start. Windows will warn you that formatting erases everything on the drive — click OK. The process takes a few seconds to a few minutes depending on the drive's size.

On Mac, the process is similar but uses a different file system. Open Disk Utility, select your thumb drive from the left sidebar, click Erase, choose Mac OS Extended (Journaled) or APFS from the Format dropdown, give it a name, and click Erase. Mac systems can also use exFAT, which works with both Mac and Windows computers if you plan to move the drive between machines.

Set the Epic Games Launcher to install to your thumb drive

Open the Epic Games Launcher and log in. Click the user icon in the top right corner and select Settings. On the left sidebar, click Installations. You will see a list of installation locations — usually just your C: drive or main drive. Click Add Installation Location, then browse to your thumb drive and select it. Click Select Folder. The launcher will now recognize your thumb drive as a valid installation destination.

Do not close this window yet. Make sure your thumb drive appears in the Installations list and shows the correct available space. If it shows less space than you expected, go back and check that you formatted it correctly and that nothing else is taking up room on the drive. This step is critical — if the launcher does not recognize the thumb drive, the installation will fail or default to your main drive.

read and install the game to the thumb drive

Go to the game's store page in the Epic Games Launcher and click Install. A dialog will appear asking where you want to install it. Click the dropdown menu and select your thumb drive from the list of installation locations. Double-check that the thumb drive is selected, then click Install.

The read will begin. The time this takes depends on your internet speed and the game's size. A 90 GB game on a 100 Mbps connection takes roughly 2 to 3 hours. Do not unplug the thumb drive or turn off your computer during this process. If the read is interrupted, the launcher will resume it the next time you try to install — you do not have to start over from zero. Once the read finishes, the launcher will verify the files (this can take 10 to 30 minutes) and then mark the game as ready to play.

Understand performance and portability trade-offs

Games run from a thumb drive will load more slowly than games on your computer's internal drive. Menus may take longer to open, textures may take longer to appear, and the game may stutter during loading screens. This happens because thumb drives transfer data at roughly 100 to 400 MB per second, while modern solid-state drives transfer at 3,000 to 7,000 MB per second. The difference is noticeable but not always game-breaking, especially for games that do not stream large amounts of data constantly.

The main advantage of a thumb drive installation is portability. You can plug the drive into any Windows or Mac computer that has the Epic Games Launcher installed, and the game will appear in your library ready to play. You do not have to read it again. This is useful if you move between computers frequently or want to play on a friend's machine without taking up space on their drive. The trade-off is clear: you gain portability but lose performance.

Move an existing game to a thumb drive if you prefer

If you already have a game installed on your computer and want to move it to a thumb drive instead of downloading it again, you can do this through the Epic Games Launcher. Open the launcher, find the game in your library, click the three dots next to it, and select Move. Choose your thumb drive as the destination. The launcher will copy the game files to the thumb drive, which can take 30 minutes to an hour depending on the game's size and your computer's speed.

Once the move completes, the launcher will update and the game will now run from the thumb drive. This method is faster than downloading if your internet is slow, but it still requires the same amount of free space on your thumb drive during the move process. The original files on your computer will be deleted once the move finishes.

Frequently Asked Questions

Can I play the game while it is installing to the thumb drive?

No. The Epic Games Launcher will not let you launch the game until the read and verification are complete. You can start playing as soon as verification finishes, even if other games are still downloading.

What happens if I unplug the thumb drive while playing?

The game will crash when ready. Your save file should be safe because most games store saves in a separate location on your computer, not on the thumb drive itself. Check the game's settings to confirm where saves are stored before you rely on this.

Can I use the same thumb drive on Mac and Windows?

Yes, if you format it as exFAT instead of NTFS. NTFS works on Mac but is read-only by default. Format the drive as exFAT, install your game on Windows, then plug it into a Mac and the game will appear in the Epic Games Launcher there as well.

Will the game run as fast from a thumb drive as from my computer's drive?

No. Expect longer load times and possible stuttering, especially in games with large open worlds or high-resolution textures. Fast-paced competitive games like Fortnite may feel noticeably slower. For regular play, installing to your computer's internal drive is always better.

Do I need to keep the Epic Games Launcher open to play a game from the thumb drive?

Yes. The launcher verifies that you own the game each time you launch it, so you must be logged in and connected to the internet. If you are offline, the launcher will not let you start the game.