WD passport + recycled bin


My WD passport is used along with WD media player for viewing movies & Tv shows.my passport is 320Gb in size while I was connected to my PC I noticed that there was only 26.4Gb free space.after I checked the files on the passport total 39.3Gb I am trying to figure out if I need to clear out the WD passports own recycled bin.i assumed when I deleted stuff that was it.but when I dble click PC recycled bin when passport is connected it shows a load of movies & Tv shows I deleted long ago.how do I resolve this problem ??