I ran Recova to get back some files I had deleted. I connected my Fuji camera with XD card and proceded to download. After about 2 hours and over 7000 files recovered, I realised that these were not my files. I have not taken 7000 pictures on this card. I use a second hand computer and I think these files belong to the previous owner (unknown). The 7000+ files have completely clogged up my C Drive and I cannot download anything I require. In attempting to recover some C Drive capacity, I deleted various programmes which I now cannot re-download as I have no capacity in C.
How can I delete the unwanted files fromC?.