H1B transfer after visa expiry in INDIA

Have a valid USA H1B expiring in another 2-3 months. If i am not using it and switching to any other company in India. Does the new company need to file a new H1B through lottery process or can they transfer the h1b visa (which might have expired already) ?

I mean can expired H1B (which still has 3 yrs leftover in 6 yrs life cycle) be transferred to any USA based employer in India ?

What problems i could face in new company if they want to do transfer ?

Normally, H1B transfer can be filed.

Have you ever used this H1B visa even for a single day?