Wi-fi is a network connection so all information about network file transfer work for wi-fi. Usually there is no need of any other software or configuration because network file transfer is already integrated in all OS.
Once the network is setup, you can use other machines hard drives as if they were local and use your usual file manager to copy or move files.
Bluetooth is not a network connection and works using a very different concept. Also it is slow to transfer large amounts of data. The file transfer via bluetooth is a nice feature for device without network connection to transfer a few small files but far from good to handle lots of files or big amounts of data. You don't have control of where the transferred file will be stored (sometimes the receiver has), you don't have user authentication (security) and it requires to give commands (or accepts) on both devices (not needed with a wi-fi network).