Jvc Everio Hd Camcorder -problem

I,m very new to computers + to most electronin gadgets in general. i bought a jvc camcorder last year .i had some recording saved. tried to load it onto computer =didn,t manage to save it to computer + also ended up deleting the saved recording on the camcorder.
i read thru instructions =says “no video files stored”
when i try to record something i get a message "HDD IS FULL "
please help