DriveDroid

★★★★★ Works absolutely amazing on A12/13 w/o any issues. Note: check, double-check your images and make sure they are bootable and that your phone is actually connected (After mount click on the top-bar showing the currently mounted file).

★★★★★ Absolutely brilliant! Just can't see why this functionality is not available out-of-the-box in android....

★★★★★ Works well on my rooted OnePlus 8 Pro. Very useful to install OS on computers, using phone as USB stick. You can even create empty USB images, that you can format from your computer as a regular USB flash drive

★★☆☆☆ I hit install and then tried to cancel when I saw it was for root, and now it won't cancel it!? My Google Play Store keeps crashing when I hit the fricking cancel button!

★★☆☆☆ A year or two ago this was the reason one had to root his/her mobile. But unfortunately this app stopped being maintained and no longer works on recent devices. Now on android 11 (and latest magisk) it does not show the image device, although your PC will detect the mass storage subsystem being presented. But the worst part is that after you tell the app to eject the image, it will no longer restore the usual behavior of your phone's USB, and it will just leave it borked until you reboot it. Not pretty. You've been warned. This should just be removed from the play store if it's no longer going to be maintained. Google should pay attention and remove dead and abandoned apps like these and force authors that charge for their apps to return the money if they abandon them. If meanwhile anyone knows a working alternative, not abandoned by its author, it would be appreciated.