How to install firmware from a file ?

I installed debian to my PC but it did not install the WiFi or Nic firmware so USB modem won`t connect. I have 2 different file types but the specific one for the Wifi modem is in a regular folder with all the files needed so my question how to install all the files in the folder to lib/firmware they are all related to the specific firmware i need to install. A image is attached to review.
Ps. I don`t want to install each one by one but just a one time deal.
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