USB Image Tool boils down the process of creating and restoring disk images of USB flash drives to a few easy steps. It has a welcoming feel for beginners while still doing the job for advanced users. Download Windows 10 Disc Image. First, you need to download the Windows 10 ISO file. Go to the download page and select the proper edition of Windows 10 in the dropdown menu. ImageUSB is a free utility which lets you write an image concurrently to multiple USB Flash Drives. Capable of creating exact bit-level copies of USB Flash Drive (UFDs), ImageUSB is an extremely effective tool for the mass duplication of UFDs.

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Overview of the USB image

If you frequently used a USB drive to save your important data, you may want to find an easy to backup USB drive in case that unexpected data loss disaster occurs when something goes wrong. Here, a reliable USB image tool - EaseUS data backup software is available for free download to help you manage the job. Except for the USB drive, the program also works with other devices like flash drives, memory card, SD card.

Advanced features of EaseUS USB image tool

• Wizard-like interface - guides you completed the disk backup and restore job even you have no professional knowledge or technical skills.
• Automatically backup data to a USB drive - automatically detects and backup data to USB devices every time when you plug it into your PC.
• Backup image compression - helps to save your disk space when you have a large number of data stored on the USB but limited free space on PC have drive.

How to use EaseUS USB image tool to create a backup image of the USB drive

After learning all the advanced features of EaseUS USB image creator, you might want to choose this tool to backup your USB drive immediately. So, next, we will create a step-by-step guide to show you how to use EaseUS USB image tool to create a backup image of a USB drive.

To create a full image backup of the USB drive:

Important Things:

• Connect all of the USB or other external devices to your computer, PC, or laptop.
• Download and launch EaseUS Todo Backup on your computer.

Then, you can follow the details below:

Step 1. Open EaseUS Todo Backup and select Disk/Partition backup.

Step 2. Select one of the USB that you want to backup. And select the other USB as the destination to save your USB data.

Basic Settings:

Sector by sector backup - All the data sectors and blank ones are to be backed up with Sector by sector backup checked. It is useful when file system error occurs. It slows down the backup speed with a relatively larger image compared with normal backup.

Destination - Click the folder icon to modify your backup destination.

Plan name and Description - An accurate plan name and appropriate description will help you distinguish easily.

Advanced backup settings are useful when you want to create a flexible and automatic backup plan.

A schedule is to create an automatic backup plan.

Backup options are to edit the advanced parameters. Image-reserve strategy is to reserve the limited image as per image retention rule.

Step 3. Then you can click proceed to start to back up USB to USB.

A bootable copy of OS X or macOS on a USB flash drive is a great emergency backup tool to have on hand. It allows you to be ready to go almost immediately should anything happen to your existing startup drive.

Why a flash drive? A bootable external or internal hard drive works well for desktop Macs but presents a cumbersome problem for notebook Macs. A flash drive is a simple, inexpensive, and portable emergency boot device that can handle OS X or the macOS. Heck, it can even have both operating systems installed, letting you use the emergency USB flash drive to boot any of the Mac's you may have. Even if you don’t use a notebook, you may want to have a bootable USB flash drive on hand.

What You Will Need

• An Intel-based Macintosh
• An install DVD of OS X 10.5 (Leopard), OS X 10.6 (Snow Leopard) or the downloaded installer image of OS X 10.7 or later or macOS Sierra and later.
• A 16 GB or larger USB flash drive

We’ve chosen to use a 16 GB or larger flash drive as a minimum for two reasons. First, a 16 GB flash drive is large enough to accommodate the current minimum amount of space required to install OS X directly from the install DVD, or macOS from a download from the Mac app store, or from the Recovery HD.

Eliminating the need to pare down the OS to get it to fit on the USB flash drive significantly simplifies the installation process. Second, the cost of USB flash drives is falling. A 16 GB USB flash drive is large enough to install both a complete copy of the macOS and some of your favorite applications or recovery utilities, making it a budget-friendly emergency device that can boot your Mac and possibly repair or recover its data and get it running again.

Using a larger flash drive can allow you to install multiple versions of the Mac operating system, or include additional utilities and apps you feel would meet your needs in an emergency. We've used a 64 GB flash drive divided into two 32 GB partitions to allow us to install OS X Yosemite and macOS Sierra which is the two Mac OS's used on our Mac's here at home.

Selecting a USB Flash Drive for Booting Your Mac

Selecting a USB flash drive to use for creating a bootable OS X or macOS device is actually relatively straightforward, but here are some concerns to consider and a few suggestions to make the selection process easier.

Compatibility

The good news is that we haven’t come across any USB flash drives that are not compatible for this purpose. If you check the specifications of USB flash drives, you may notice that they sometimes don’t mention Macs, but fear not. All USB-based flash drives use a common interface and protocol to ensure compatibility; Mac OS and Intel-based Macs follow these same standards.

Size

It’s possible to install a bootable copy of OS X on USB flash drives smaller than 8 GB, but it requires fiddling around with OS X’s individual components and packages, removing the packages you don’t need, and paring down some of OS X’s capabilities.

For this article, we’re going to forego the extra steps and all that fiddling, and instead install a fully functional copy of OS X onto a USB flash drive. We recommend a 16 GB or larger flash drive because it’s big enough to install a complete copy of OS X, with room to spare for a few applications.

This is also true of macOS, the later versions of the Mac operating system. 16 GB is really the smallest size flash drive you should consider, and like just like most storage issues, bigger is better.

Speed

Speed is a mixed bag for USB flash drives. In general, they’re pretty speedy at reading data but they can be agonizingly slow at writing it. Our primary purpose for the USB flash drive is to serve as an emergency boot and data recovery drive, so we’re most concerned with read speed. Focus on read speeds rather than write speeds when you shop for a USB flash drive. And don’t be alarmed when it takes longer than normal to install the Mac OS, because you will be writing lots of data.

Type

USB flash drives are available in multiple flavors of the USB interface. While the standards tend to change over time, currently USB 2 and USB 3 are the two common interface types. Both will work with your Mac, but if your Mac has USB 3.0 ports (most Macs since 2012 have USB 3 ports), you will want to use a flash drive with USB 3 support for the faster read and write speeds available.

If you're using a MacBook with USB 3-C ports, you will likely need an adapter to go between USB 3-C and USB 3. Apple is the primary source for this type of adapter, but as USB-C gains popularity, you will be able to find third party suppliers at reasonable prices for the adapters.

Format Your USB Flash Drive for Use with the Mac

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Most USB flash drives are formatted for use with Windows. Before you can install OS X on a USB flash drive, you will need to change the drive’s formatting to the standard used by OS X (Mac OS X Extended Journaled).

Format Your USB Flash Drive

1. Insert the USB flash drive into your Mac’s USB port.
2. Launch Disk Utility, located at /Applications/Utilities/.
3. In the list of drives attached to your Mac, select the USB flash drive device. In our case, it’s called 14.9 GB SanDisk Cruzer Media. (Like lumber, hard drives and flash drives are actually slightly smaller than their specs would have you believe.)
4. Click the Partition tab.
5. Select 1 Partition from the Volume Scheme drop-down menu.
6. Enter a descriptive name for your flash drive; we chose Boot Tools.
7. Select Mac OS X Extended (Journaled) from the Format drop-down menu.
8. Click the Options button.
9. Select GUID Partition Table from the list of available partition schemes.
10. Click OK.
11. Click the Apply button.
12. A sheet will drop down, warning you that you are about to erase all data from the disk. Click Partition.
13. Disk Utility will format and partition your flash drive.
14. Quit Disk Utility.

If you're using OS X El Capitan or later you may notice that Disk Utility looks and operates a bit different. The process for formatting your flash drive is very similar to what is outlined above.

Enable Ownership of Your USB Flash Drive

In order for a drive to be bootable,​ it must support ownership, which is the ability of files and folders to have specific ownership and permissions.

1. Locate the USB flash drive on your Mac desktop, right-click its icon, and select Get Info from the pop-up menu.
2. In the Info window that opens, expand the Sharing & Permissions section, if it’s not already expanded.
3. Click the lock icon in the bottom right corner.
4. Enter your administrator password when asked.
5. Remove the check mark from Ignore ownership on this volume.
6. Close the Info panel.

Install OS X or macOS on Your USB Flash Drive

Once you complete the previous step, your USB flash drive will be ready for you to install OS X.

Install OS X

We prepared the USB flash drive by partitioning and formatting it and then enabling ownership. The flash drive will now appear to the OS X installer as just another hard drive that is ready for installation of OS X. Because of our preparation, the steps for installing OS X will be no different than a standard OS X installation.

Having said that, we recommend that you customize the software packages that OS X will install. Because of the limited space on the USB flash drive, you will need to remove any printer drivers that you don’t use, as well as all of the extra language support that OS X installs. Don’t worry if this sounds complicated; the installation instructions we link to here are step-by-step guides and they include information on customizing software packages.

Before you begin the installation, a few notes about the process. As we mentioned earlier, USB flash drives are much slower at writing data. Since the installation process is all about writing data to the USB flash drive, it’s going to take quite some time. When we performed the installation, it took about two hours. So be patient, and don’t worry about how slow some of the processes seem; this is normal. You can expect to see plenty of beach balls and slow responses as you work your way through the installation process.

Ready to install? Click the link below for your OS and follow the step-by-step guide.

Using a USB Flash Drive as a Startup Volume

Now that you have installed OS X on your USB flash drive, you’ve probably noticed how slow it seems. This is normal for flash-based drives, and there’s not much you can do about it, except to buy the fastest USB flash drive in your price range.

If speed is a big issue for you, you can entertain the idea of purchasing a small SSD in a portable enclosure. Some manufacturers are making SSDs that are just slightly larger than the standard flash drive. Of course, you will pay a premium for the speed.

It’s important to remember why you’re creating this startup drive. It’s for use in an emergency, when your Mac won’t boot, either because of a hard drive problem or a software-related problem. A bootable USB flash drive will help you get your Mac back to working condition, by letting you use all of the tools a fully-working Mac has available.

In addition to being able to use Disk Utility, the Finder, and Terminal, and have access to the Internet, you can also load some specific emergency tools onto your USB flash drive. Here are some of the utilities we suggest installing. You don’t need to have all of them; in fact, it’s unlikely they would all fit onto the flash drive after you install OS X, but having one or two certainly makes sense.

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Emergency Utilities

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• Data Rescue for data recovery.
• DiskWarrior for data recovery, disk testing, and disk repair.
• Drive Genius for disk repair, defragmenting, partitioning, copying, and other useful tools.
• TechTool Pro for memory testing, drive testing, data recovery, and Mac hardware testing.