Remove Virus from your memory or USB

I've been once searching for the best way to remove virus from memory or USB. All I know is to use an anti-virus like AVG, Norton, Avira (Free Version) and some sort of it. But I don't really know a lot about hidden viruses. I need to know how to remove virus from removable devices other than the virus I usually encounter in my computer. A lot of people don't mind about viruses from their memory so when they connect it to another computer , it will automatically infect the said PC specially if no anti-virus is present. Unfortunately, you can't detect if you're infected or not unless you used an anti-virus. But still, using anti-virus is not a guarantee and it's impossible to eliminate them as well without learning how to really remove it. 

Now, I learned another idea from someone who freely shared it to us. It may seem basic, but I admit I really don't know about it. This is about the use of command prompt or CMD.

Take note about the image. So, to make hidden files appear, you have to type as shown above. If your memory is in drive I, just type DIR /ah. Then, files in that directory will appear as encircled above. Then, one by one make it to appear in the windows explorer by typing Attrib "FILENAME" -r -a -s -h. Type the exact format (considering Capital and small letters). Then, look into your windows explorer and you'll find all the files there.

Notice that when you see a file type as FILE FOLDER that's ok but when it is an APPLICATION TYPE, don't click and delete it if possible.

Hope This help.