We recommend three tools for restoring USB to original state. However, some of you may encounter difficulties when restoring USB to default capacity. There may be other reasons that urge you to restore USB drive to the original state. Similarly, if you want to restore bootable USB to normal, you can just format USB drives.
HOW TO REFORMAT USB FLASH DRIVE MAC FULL
If you want to restore USB drive back to full capacity, you just need to delete files in the USB flash device.
You can check What Is Disk Formatting to know their differences. However, this method will shorten service life of USB drives to some extent. Some people may suggest that you could use a USB disk mass production tool to restore USB to factory default settings through low-level formatting.
If the above problems happen, you may wish to restore USB drive to original state to find back the lost capacity and make it back to normal. In another word, the USB device can't work as usual. For example, the USB flash pen drive may contain less capacity than its original state for unknown reason the flash device might have less capacity after it was made as a USB bootable drive. However, the various usages will simultaneously lead to multiple problems.
You can check Comprehensive Usage Tutorial of USB Flash Drive to know more details. Generally, a USB device has various usages. USB drives are data storage devices that use flash memory to store data and connect to computer through USB interface. When Do You Need to Restore USB Drive to Original State
HOW TO REFORMAT USB FLASH DRIVE MAC HOW TO