Use konqueror. It is a file manager, web browser, ftp client, Windows network browser, SSH/SCP client all in one.
For files just use the URL: /path/to/some/files
For ftp: ftp://username:razz:[email protected]/to/upload/
For http: http://username:razz:[email protected]/to/download/
For Windows network Samba SMB: smb://domain\[email protected]
For SSH/SCP: fish://[email protected]