In case of an OS crash, system backup is very important forPC disaster recovery.
But choosing a storage place seems more significant.
Here are the reasons for doing a Windows 10 backup on USB flash drive.

In addition, NAS (web connection-attached storage) is another choice.
Thus,backing up Windows10 to your USB drive is recommended.
Here comes a question: can I back up my computer to a flash drive?

Or can I back up Windows 10 to a flash drive?
The answer is yes.
Now USB manufacturers have made USB extremely light with huge capacity and stable performance.

It is safe for system and data since it is separated from a computer.
This edition allows you to use it freely within 30 days.
To do this job, c’mon go to theToolspage, and clickMedia Builderforbootable mediacreation.

Step 1: In theToolsinterface, clickClone Diskto continue.
Step 2: Choose the system disk where Windows 10 is installed as the source disk.
Choose a USB drive as a target disk.

Step 3: Now this backup software is cloning Windows 10 system disk to a flash drive.
Once it completes cloning, plug the USB drive from the computer.
By this way, all the system disk data is backed up to the USB drive.

Here are the steps:
1.
Format the USB drive toNTFS.
Create a directory on the USB flash drive and right-click it to clickShare withandSpecific people.

Choose yourself from the users list and clickShareandDone.
Right-choose the directory to selectProperties, then go toSharingand chooseAdvanced Sharing.
Ensure the allow permissions are set toFull Control.

Go to theBackup and Restore (Windows 7)interface and clickCreate a system image.
Then Windows 10 shows you the backup will include all system partitions required for the OS to run.
After confirming your backup parameters, clickStart backup.

After a few minutes, you might successfully create Windows 10 backup to a USB drive.
How to a create Windows 10 recovery USB?
Then, click theNextbutton to continue.

Later, grab the USB drive.
You may ask: how big of a USB do I need for Windows 10 recovery?
Here, Windows will tell you the minimum disk space that the USB drive should hold.

Step 4: A warning message will appear, informing you that everything on the drive will be deleted.
just ensure you have backed up your personal files if there is any before you go on.
Step 5: Now Windows 10 is creating the recovery USB drive.

Wait patiently until the creation process completes.
Just enter the BIOS to set the recovery drive as the first boot order.
You are lucky and this post shows you some methods to create system image on flash drive.

By comparison, MiniTool ShadowMaker is easier and more to reliable back up Windows 10 to USB.