using usb to boot from is a shitty idea, use the ssd. rig will boot best on that. not to mention usb sticks were never ment to be treated as a hard drive and be used 24/7, eventually it will just die. seen people talk about it enough
Hi I need to boot from USB in order to install an OS on SSD.....
I had the same problem on Biostar TB 250 PRO BTC, it didn't recognize the already made USB with OS on it. What I did is as follows:
Found an option in the last tab of Biost where it said Restore defaults and reboot.
After this it started automatically the USB with OS on it and started the installation.
You can give this a try. Our boards are almost identical (only mine has much much better options in the BIOS to configure
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
).