When FreeNAS initially boots, you’ll be presented with a simple text menu with 11 options.Īfter booting to the flash drive, you’ll ultimately see a simple text menu with 11 options. Insert the flash drive into the machine you want to use with FreeNAS, boot to the drive, and the OS should launch. It shouldn’t take more than a minute or two to write the disk image to the drive. Hit the Write button, and Win32 Disk Imager will take care of the rest. In the Device drop-down menu on the right, make sure your flash drive’s drive letter is selected. Next, insert your flash drive, run Win32 Disk Imager, and select the FreeNAS_圆4.img image file. The entire image is only 1.86GB, though it requires a drive with a capacity of at least 4GB to boot and run reliably. Writing the FreeNAS OS image file to a USB flash drive takes only a few seconds. You’ll wind up with an image file named FreeNAS_圆4.img, which you’ll need to write to the flash drive to install the OS and make the drive bootable. Once you’ve downloaded the ISO, mount it in Windows by right-clicking its file icon and selecting Mount, or open it in your file archiver (we used WinRAR) and extract the file named FreeNAS_圆4.img.xz.