Lately I have upgraded my PC and the former I had , I still have it but will format it soon with Windows as I will gift it to a friend of mine. I have a Multibit Classic there with a lot of wallets some of them even containing really little bitcoin on them(not that important to me) but I want to know how can I copy my Multibit Classic in a USB and use on my new computer if there is a way.
On my new PC I will install Multibit HD but if there's a way why not have both classic and HD.
...because Multibit HD is a significant improvement over Multitbit Classic.
#1 Its HD so you only need a single backup
#2 Its still developed so you still get improvements
#3 Its significantly harder to crack with brute force
#4 it supports hardware wallets
However if you want to use both you can. The file locations can be found here[1] and here[2].
[1]
https://multibit.org/help/v0.5/help_troubleshooting.html[2]
https://multibit.org/help/v0.5/help_fileDescriptions.html