How To Convert a Bootable USB to an ISO File

In the world of system administration and data management, having a bootable USB is a handy tool. However, there may be times when you need to convert that bootable USB to an ISO file. This article will guide you through the process of converting a bootable USB to an ISO file using both Linux and Windows operating systems.

What is an ISO File?

An ISO file, often called an ISO image, is a single file that perfectly represents a complete CD, DVD, or BD. The entire contents of a disc can be precisely duplicated in a single ISO file. Think of an ISO file like a box that holds all the parts to something that needs to be built—like a child’s toy. You get the box from the store, take it home, and then build the toy yourself.

Converting Bootable USB to ISO in Linux

There are several ways to convert a bootable USB to an ISO file in Linux. One of the most common methods is using the dd command.

Using dd Command

The dd command is a powerful tool that you can use to create an image from your USB drive. Here’s how to do it:

1. Open a terminal.
2. Run the following command:

sudo dd if=/dev/sdx of=/path/to/new.iso

In this command, if stands for ‘input file’ which should be your USB drive. Replace /dev/sdx with the correct drive for your USB, such as /dev/sdc. of stands for ‘output file’. This is where you want to save the ISO file. Replace /path/to/new.iso with the path where you want to store the ISO file.

Using gnome-disks Utility

If you have a GNOME-based desktop environment, you can use the gnome-disks utility. Here’s how:

1. Open a terminal.
2. Run gnome-disks or search for the “Disks” application in the Dash.
3. Once the USB stick is mounted, select it.
4. Click on the “more actions” icon and choose “Create Image”.

However, note that this method may not copy the boot record, resulting in an unreadable boot medium in some cases.

Converting Bootable USB to ISO in Windows

For Windows users, you can use a freeware tool called “USB Image Tool”. This tool allows you to create images of bootable USB devices and restore them later.

1. Download the tool from the official website at http://www.alexpage.de/usb-image-tool/download/.
2. Install and run the tool.
3. Select your USB drive from the list and click on the “Create” button.
4. Choose the location where you want to save the ISO file and click “Save”.

The tool will then create an ISO file from your bootable USB.

Conclusion

Converting a bootable USB to an ISO file can be a straightforward process, whether you’re using Linux or Windows. Just remember to exercise caution and double-check the drive you’re using to avoid data loss. Once you have converted the bootable USB to an ISO file, you can store it on an external hard drive or any other storage device. In case of problems, you can then use tools like unetbootin to create a bootable USB from the ISO file.