This is how I successfully dumped my entire ROM collection and BIOS files:

• SNES, Gameboy, Gameboy Color, Gameboy Advance, N64, Sega Master System, Sega Genesis: Get the Retrode 2

https://www.dragonbox.de/en/313-retrode2-with-all-plugins-bundles-4260416651043.html

• NES: Get the Kazzo

http://www.infiniteneslives.com/kazzo.php

• Gamecube and Wii: Get a Wii and Letterbomb it, then use CleanRip with a USB stick or SD Card

https://please.hackmii.com/

http://wiibrew.org/wiki/CleanRip

• Dreamcast: Get a Dreamcast, buy a DC SD card and burn Dreamshell to a CD-R

http://dc-sd.com/

http://www.dc-swat.ru/page/dreamshell/

• PS1, PS2 and Saturn: Rip with your CD or DVD drive using ImgBurn

BIOS Files:

• Dreamcast - Use Dreamshell to copy the bios to the SD card

• PS2 - Buy a FreeMcBoot memory card off eBay and use PCSX2.net's Bios Dumper 2 to dump the bios to a USB stick:

http://www.ebay.com/itm/FMCB-Official-Genuine-Sony-PlayStation-2-Memory-Card-with-Free-Mcboot-1-953/221935815427?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

https://pcsx2.net/download/releases/tools/send/9-tools/10-ps2dumper-bin.html

• PS1 - Use a Gameshark disc to swap in a burned copy of Shendo's Bios dumper then use the PS2 with FreeMcBoot to transfer the Bios files from the PS1 Memory Card to a USB stick:

http://ngemu.com/threads/psx-bios-dumping-guide.93161/