The key features of DriveDroid without root include:
In terms of performance, DriveDroid without root works reasonably well. File transfer speeds are comparable to those of a traditional USB drive. However, the app's performance may vary depending on the device's hardware and the quality of the USB cable used.
Then, a new line of text appeared, white on black.
Leo stared at the phone. "You're useless to me," he muttered, though he knew that wasn't entirely true.
It was a sobering read. Without root, DriveDroid was essentially dead weight. The app couldn't bridge the gap between the phone's internal storage and the computer's BIOS. The computer would see a device, maybe, but it wouldn't see a bootable disk. It would see a "storage container" and promptly ignore it when trying to boot.
The app popped up its familiar dialog: How do you want to host this image?