not connecting mouse and keyboard but it is connecting two other devices besides my mini.

KeithAlanBallard Said:

"not connecting mouse and keyboard but it is connecting two other devices besides my mini.: How to connect keyboard and mouse to mini doing factory reinstall,"

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Reset your SMC and your NVRAM:

Sometimes changes (i.e. Installations) are made to the system and then settings (i.e. Keyboard) become corrupted, technically. So, reset both on your Mac. So, reset the SMC and reset the NVRAM or PRAM. It might take three tries. to fix this. So, be certain you have the time to do so.

Refer to these Two Links:

• Reset NVRAM or PRAM on your Mac - Apple Support
• How to Reset the SMC of your Mac - Apple Support

Use a hardwired keyboard for this.

Your best bet to get thru an erase and reinstall, is to get and use a USB keyboard and mouse.

Most any inexpensive USB keyboard and mouse will work with the Mac mini and other Mac's. Personally I have and use a Logitech MK120 combo everyday, plus I keep a spare around for troubleshooting a wide verity of Mac models.

https://www.logitech.com/en-us/products/combos/mk120-usb-keyboard-mouse.920-002565.html