I have an old Aurora R1 desktop using BIOS A11. I wanted to be able to boot from an External USB hard drive but the BIOS is not 'seeing' the external drive. The only USB drives shown is my 15 in 1 flash drive. Is there any way that the external drive can be added to the BIOS?

System Manufacturer Alienware
System Model Aurora R1
System Type x64-based PC
System SKU 0
Processor Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz, 3334 Mhz, 6 Core(s), 12 Logical Processor(s)
BIOS Version/Date Alienware A11, 7/30/2010
SMBIOS Version 2.5
Embedded Controller Version 255.255
BIOS Mode Legacy
BaseBoard Manufacturer Alienware
BaseBoard Product 04VWF2
BaseBoard Version A02