Q: i want to boot LINUX BT3 on my USB drive but don't know if it will support booting were, can i find out if i can boot with it or were can i find a USB that can boot
A: I'm pretty sure that depends on the motherboard / laptop you're using, not the flash drive itself. You normally have to go into the BIOS and set the boot device to USB (if it is supported.) It will just treat the USB device like any other bootable device. Of course, the operating system you put on there (linux BT3 in this case) should be able to write itself to the drive first.