This question already has an answer here:
Ref: Uploaded documents getting checked out by default in Sharepoint 2010 which does not address an adequate answer, and the question is lacking details.
I am in explorer view, and I drag and drop a new file into a folder. In versioning settings, I have "require check out" set to YES. None of my metadeta columns are set to "required."
After dragging/dropping, the file(s) are checked out to me. I would like them to be checked in on initial upload, considering I have no metadata required to be entered.