Re: Save a duplicate file to locally
You can have WinSCP retain temporary local copy of edited file using Keep temporary copies of remote files in deterministic paths setting.
You can also have it not to store the copies to temporary folder.
For both, see https://winscp.net/eng/docs/ui_pref_storage
You can also have it not to store the copies to temporary folder.
For both, see https://winscp.net/eng/docs/ui_pref_storage