Reading these comments I feel obliged to mention the Android app 'DriveDroid' which lets you store multiple disk images on your phone and then acts as a bootabl

Reading these comments I feel obliged to mention the Android app 'DriveDroid' which lets you store multiple disk images on your phone and then acts as a bootable USB disk. I've got GParted, CloneZilla, Alpine, Debian etc live disks always in my pocket. All I need is a micro-usb cable (which most modern homes seem to have laying around) to boot into various OSs and tools. No affiliation, I just think it's a cool free app and it's proven very handy for me loads of times.