Here's how to create a bootable Windows installation USB drive starting with a Windows .iso file or a Windows Setup DVD.
Note
For new Windows 10 installations, we've got a tool that does this for you. See Download Windows 10.
What you need
- Windows 10 install .iso or DVD
- USB flash drive with at least 5GB free space. This drive will be formatted, so make sure it doesn't have any important files on it.
- Technician PC - Windows PC that you'll use to format the USB flash drive
- Destination PC - A PC that you'll install Windows on
Step 1 - Format the drive and set the primary partition as active
Connect the USB flash drive to your technician PC.
Open Disk Management: Right-click on Start and choose Disk Management.
Format the partition: Right-click the USB drive partition and choose Format. Select the FAT32 Running man episodes eng sub. file system to be able to boot either BIOS-based or UEFI-based PCs.
Set the partition as active: Right-click the USB drive partition and click Mark Partition as Active.
Note
If Mark Partition as Active isn't available, you can instead use diskpart to select the partition and mark it active.
Step 2 - Copy Windows Setup to the USB flash drive
Use File Explorer to copy and paste the entire contents of the Windows product DVD or ISO to the USB flash drive.
Optional: add an unattend file to automate the installation process. For more information, see Automate Windows Setup. Mbkd.
Step 3 - Install Windows to the new PC
Connect the USB flash drive to a new PC.
Turn on the PC and press the key that opens the boot-device selection menu for the computer, such as the Esc/F10/F12 keys. Select the option that boots the PC from the USB flash drive.
Windows Setup starts. Follow the instructions to install Windows.
Remove the USB flash drive.
Troubleshooting: file copy fails
This can happen when the Windows image file is over the FAT32 file size limit of 4GB. When this happens:
![Format Flash Drive Windows 10 Format Flash Drive Windows 10](https://5zmgwchi4v-flywheel.netdna-ssl.com/wp-content/uploads/unable-format-usb-8.png)
Copy everything except the Windows image file (sourcesinstall.wim) to the USB drive (either drag and drop, or use this command, where D: is the mounted ISO and E: is the USB flash drive.)
Split the Windows image file into smaller files, and put the smaller files onto the USB drive:
Note, Windows Setup automatically installs from this file, so long as you name it install.swm.
Related topics
Cannot format USB or external hard drive to FAT32 in Windows 10
Mostly, people would like to format a USB flash drive or external hard drive to NTFS. But sometimes, you may want to format a USB flash drive or external hard drive to FAT32 in Windows 10 for some reasons, like making the USB or external hard drive faster when writing mostly large files to it or ensuring the compatibility with non-Windows operating systems.
But the problem is that the max partition size of FAT32 is 32GB, which means you can only format devices smaller than 32GB into this file system. From the chart below, you'll have a better understanding of why you can't format USB or external hard drive (more than 32GB) to FAT32:
Windows 10 Disk Management tool also can't do this on a USB drive or hard drive which is bigger than 32GB. Fortunately, this page will show you how to do it by using CMD command line and professional Windows 10 FAT 32 format tool.
- Notice:
- Formatting a USB drive or external hard drive will remove all existing files on the device. Please make sure you have backed up files before formatting to avoid further data loss.
Format to FAT32 using CMD command line (Free)
A simple and free way to format your flash drive or external hard drive to FAT32 in Windows 10 is using CMD command line. It's a built-in tool in Windows, enabling you to format, create, delete, extend, and shrink partitions without rebooting the system.
Please be careful while using CMD for FAT32 formatting with the following steps:
Step 1: Type command prompt in Windows 10 search bar or right-click on 'Windows icon' > select 'Search', and type cmd.
Step 2: Right-click on 'Command Prompt' and select 'Run as Administrator'.
Step 3: Type the command format fs=fat32 quick at the prompt and hit 'Enter'.
![Format usb ntfs windows 10 Format usb ntfs windows 10](https://www.tenforums.com/attachments/installation-upgrade/114808d1485975176t-cant-install-windows-10-because-gpt-partition-error-message-format-usb-flash-drive-fat32-file-system.png)
Windows 10 will begin formatting the USB flash drive or external hard drive into FAT32.
Step 4: Type exit when the process has completed.
Use EaseUS Windows 10 FAT32 formatting tool (Easier & Safer)
If you prefer a safer and easier way to format your USB flash drive or external hard drive to FAT32, you can try a professional third-party Windows 10 FAT32 formatting tool. We recommend you try EaseUS partition manager with its Format partition feature. Now, download and install this tool on your computer, then follow the steps to get things done.
Step 1: Launch EaseUS Partition Master, right-click the partition on your external hard drive/USB/SD card which you want to format and choose the 'Format' option.
Step 2: Assign a new partition label, file system (NTFS/FAT32/EXT2/EXT3), and cluster size to the selected partition, then click 'OK'.
Step 3: In the Warning window, click 'OK' to continue.
Cannot Format Flash Drive Windows 10
Step 4: Click the 'Execute Operation' button in the top-left corner to review the changes, then click 'Apply' to start formatting your external hard drive/USB/SD card.
Smaller cluster size makes less wasting of disk space. The smaller the cluster size is, the bigger file allocation table (FAT) will be. The bigger the FAT is, the slower the operating system works with the disk.
Final Word
Format Flash Drive Windows 10
This page tells how to format a USB or external hard drive into FAT32, which is especially helpful in formatting devices bigger than 32GB into FAT32 without data loss. If you want to convert devices into NTFS without formatting, please refer to How to Convert FAT to NTFS for help.