Which protocol is responsible for transferring files between devices ?

TCP

IP

HTTP

FTP, etc..

these protocols used to transfer files between one end to another end.

for File Transfer Protocol TCP/IP is Responsible protocol.

Answered as per my understanding, may be questions is Different.

FTP, TFTP

FTP, TFTP in Presentation/Application Layer (OSI Model)

TCP and UDP in Transport Layer (OSI Model)

FTP and TFTP

In security side, I will include the following protocols:

SFTP, IPsec, SSH, HTTPS, SSL/TLS

FTP

The protocol used is depend upon how you transfer your data. IT it from web or File server then HTTP and FTP used. If you transferring data from Local LAN you are using SMB for window and NFS/CIFS used in UNIX.