By AOMEI / Last Updated January 8, 2020

USB flash drives with boot files

Short for Universal Serial Bus, USB has become one of the most popular storage devices. Due to its small size, light weight and convenient carrying, this kind of storage device is often used for data transmission as well as data storage. Compared to hard drives, it is not only cheaper, but also serves you longer, as it has no fragile moving parts.

Because of theses merits, more and more people use USB flash drives as bootable devices now. A bootable USB flash drive is an optical disk that is created with boot files and can be used to boot or troubleshoot your computer when disasters happen. You just need to change the boot priority to USB in BIOS menu.

Reasons to copy bootable USB to USB

Now you know how important bootable USB drives are. You may want to figure out how to copy USB to USB with boot files sometimes. Generally speaking, there are two main reasons why you need to do this.

  • Upgrade bootable USB drives. With lots of times plug in and plug out, your flash drive is vulnerable and likely to go wrong. Thus, you have to replace it with a new one. Besides, you sometimes need to upgrade your old bootable USB drive to a larger one, because it might be filled up after long period of usage.

  • Duplicate bootable USB drives. Since USB drives are very small, they are easy to lose. So, you’d better backup bootable USB by copying bootable USB to another USB in case you lose it. Moreover, you can duplicate the bootable USB stick to share the same system booting files with others.

Considering the particularity of bootable USB drives, users can’t directly take the traditional copy-paste method to copy a bootable USB drive to another USB drive. This approach is time consuming and even may lead to program corrupted or OS unbootable. In contrast, cloning bootable USB is faster and safer. Most of all, the cloned USB drive will remain bootable.

Freeware to clone bootable USB to USB

Since Windows doesn’t offer you a direct way to clone bootable USB drives, you may need reliable third party clone software to do it. To clone bootable USB drives easily and efficiently, AOMEI Backupper Standard is highly recommended.

This utility comes with disk clone feature that owns the ability to copy your bootable USB drive to another USB drive, HDD or SSD. After checking the Sector by sector clone box, this program will make an exact copy of your bootable USB drive including hidden or protected data, master boot record and so on.

The intuitive interface makes this utility easy to get going. More pleasing, you can download it for free! It works for Windows 10/8.1/8/7/Vista/XP currently.

Quick guide on how to copy USB to USB with boot files

Before you start, insert two USB drives to your computer via USB ports. Make sure they can be detected by Windows. Please note that the destination disk will be overwritten after cloning. If there is any data on it, don't forget to perform a disk backup in advance. Now, follow the steps below to clone bootable USB to another USB.

Step 1. Install and launch this freeware.


Step 2. Click Disk Clone under Clone tab.

Disk Clone

Step 3. Select the bootable USB drive (here is Disk 1) as the source disk. Then click Next.

Source Disk

Step 4. Select the destination disk (here is Disk 2) that you want to clone the bootable USB drive to. Then click Next.

Destination Disk

Step 5. Confirm your operations and then click Start Clone.

Start Clone


  • Edit partitions on the destination disk: click it to resize partitions on the destination disk. Copy without resizing partitions, Add unused space to all partitions and Manually adjust partition size are available. To enjoy the last option, you need do an edition upgrade.

  • Sector by sector clone: it will clone every sector of the bootable USB drive. Remember that the target disk must be equal to or larger than the source disk.

  • Align partition to optimize for SSD: works well to improve the working performance of SSD. It is strongly recommended to choose this option, if the destination disk is SSD.

  • As for the old bootable USB drive, you can keep it as a backup or reformat it for other purposes.


How to copy USB to USB with boot files? AOMEI Backupper Standard can be the best answer. Not only does it allow you to clone bootable USB drive to another storage device in a short time, it also gives you many advanced options. Except for clone, this freeware also serves you well as a bootable rescue media creator.