Is there a way to avoid using thumb drive or pen drive for file sharing so as to avoid the spreading of viruses?
You may use any File Sharing Server that is available to you.
Here, we shall use HFS or the Hypertext File Server by Rejetto.com, which is free!
After you have downloaded the hfs.exe file, just keep it some where easy to access and just double click on it to RUN the programme. You do not need to install it in the C drive.
Kan, Sumitra Fong Kuen. (2014). HFS Basics: How to share your files the easy way.
If you would like to share a folder containing many items, it is the best practice to zip the folder so that the client may download the whole zipped folder instead of downloading item by item.