Recently I read a post about Wi-fi HD.
Did you hear anything of such hard drives?
First of course, WiFi is networking. HDs attached via the 'network' are known as
NAS; Network Attached Storage
NAS is a means to provide extra storage to all systems on the LAN.
HOWEVER --- be extremely cautious here! WiFi may disconnect for 1,000,000 reasons
and that would corrupt the current file being written and may even corrupt the whole HD.
If you need NAS, use an ethernet wired connection