Question:What are file details? How can you view file details? 

File details refers to file size, file type, create time, read only etc. We can view file details right clicking the file and select properties. Shortcut: alt + Enter.

Question:What is file compression? What are the benefits of file compression? 

File compression lets you make the size of files smaller.
This is useful when you need to save space on a disk or when you are sending a file as an email attachment and you want to keep the size of your attachments as small as possible.