|That is a new name for a USB flash drive. |
First of all, your computer must be capable of boot from that USB device. Check in the BIOS (setup) for boot options.
If that is the case, then the device needs to be boot able. Simply copying files to it doesn't make the drive boot able.
No real need to make two partitions. Flash drives are not very dependable so using one as a storage medium is not a good idea. They are best suited for transfer/transport of files.
Using FAT32 on the flash drive would be better. Easier recovery, should that be necessary.
One other point to mention is that you should always maintain at least two copies of any data you want to keep.