fedora-docs-l10n/fedora-install-guide/f34/pages/install/Preparing_for_Installation — Chinese (Simplified) @ Fedora Weblate: Always think twice before writing an image to the device. …

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	Upgrade or Install?
	If you already have Fedora installed and want to upgrade your installation to the current version, there are two basic ways to do so:
	Automatic upgrade using [application]dnf system upgrade
	The preferred way to upgrade your system is an automatic upgrade using the [application]dnf system upgrade utility. For information on performing an automatic upgrade, see link:++https://fedoraproject.org/wiki/DNF_system_upgrade++[Fedora Wiki dnf system upgrade].
	Manual Reinstallation
	You can upgrade to the latest version of Fedora manually instead of relying on [application]dnf system upgrade. This involves booting the installer as if you were performing a clean installation, letting it detect your existing Fedora system, and overwriting the root partition while preserving data on other partitions and volumes. The same process can also be used to reinstall the system, if you need to. For detailed information, see xref:advanced/Upgrading_Your_Current_System.adoc#sect-upgrading-fedora-manual-reinstall[Manual System Upgrade or Reinstallation].
	Always back up your data before performing an upgrade or reinstalling your system, no matter which method you choose.
	Preparing Boot Media
	Fedora images are `Hybrid ISOs` and can be used to create installation media with both optical and USB disks, for booting on both BIOS and UEFI systems.
	Fedora Media Writer
	[application]Fedora Media Writer has been significantly improved and is now the official, tested and supported way to make bootable media. [application]Fedora Media Writer supports Linux, Mac, and Windows. It is an easy way to make bootable USB media to install Fedora (or other operating systems). Using [application]Fedora Media Writer is strongly encouraged, although other USB media creation software can work as well.
	Some of the new additions to [application]Fedora Media Writer are that Fedora Workstation and Server are easily and quickly accessible from the selection on the main screen. Further choices are available if you select the button below _Custom image_. This offers a selection of various Fedora Spins, such as Xfce or Mate.
	Historically, universal USB creation tools, such as [application]Unetbootin, are a popular way to create USB installers from ISOs intended for optical media. They typically create a filesystem on the USB drive by extracting files from the image, and writing [application]syslinux bootloader to the device.
	These methods circumvent the boot-loader configuration built into Fedora images, which are pre-partitioned and designed to boot on UEFI systems with SecureBoot enabled as well as BIOS systems, and thus they do not produce consistent results with Fedora images, especially on UEFI systems.
	The best results are produced by utilities that use a direct write method and do not modify the Fedora image.
	Always think twice before writing an image to the device. The media creation methods described in this article are destructive. All data on the USB stick are deleted during the process, so make sure you have a back up of the data on the USB stick. Double check that you have selected correct device to write the image to!
	Installing and running Fedora Media Writer
	On Fedora
	On Fedora 25 or later, [application]Fedora Media Writer is available in the default repository. You can use `dnf` to install the package.
	To install the [application]Fedora Media Writer using:
	$ [command]#sudo dnf install mediawriter#
	Run the [application]Fedora Media Writer:
	$ [command]#mediawriter#
	or in [application]Gnome 3 select Activities and then click on [application]Fedora Media Writer.
	On other Linux distributions
	The best way to install [application]Fedora Media Writer on various Linux distributions is to use the pre-built _Flatpak_ package. The package can be obtained from the official Flatpak repository https://flathub.org/apps/details/org.fedoraproject.MediaWriter[Flathub.org].
	To setup Flatpak on your Linux system, follow the guidelines on the https://flatpak.org/setup/[Flatpak documentation] page.
	Run the application:
	$ [command]#sudo mediawriter#
	On Windows
	Download the latest Windows Installer file from link:++https://getfedora.org++[GetFedora.org]. The server automatically detects the running system and offers you the correct installation file for your Windows version.