Will you deliver a CD after purchased?
Sorry, No, there’s no CD backup or bootable CD to deliver after you purchased.
In fact, you can create your own bootable CD or USB from the built-in function ‘Bootable media’.
If you have a spare USB, burning ByebyeData Eraser to it will be a good choice. I think the USB is more portable than a CD.
Do I have to use boot from USB when everything I use your program?
No, you don't have to.
When you're intended to erase files, folders, data drives, or data disks, for example, you can directly run the software after Windows is booted. No need to boot from USB, although you can do the same thing from it.
Only when you want to erase everything or erase the disk or drive that the operating system installed on, the ByebyeData Eraser boot USB is required.
Do you have limitations of creating bootable media?
I mean how many times of this function can I use when I lost the previously burned one.
Unlimited, you can create as many ISO file as you like; there're no limitations on the times of using this feature. Besides, we'll update ByebyeData Eraser consistently; I think that's when you can create the new ISO file to experience the new features.