What exactly are you asking about?
If you want to have the blockchain stored on your HDD instead of the main SSD, then you can start Bitcoin Core with the
-datadir=<path> option where <path> is the path to the folder where you want the blockchain to be stored.
If I download it through torrent, can I point the torrent to the D storage and start Bitcoin core from there ?
Download what through torrent? The blockchain? If so, do not use any torrent to download the blockchain. It will be slower than allowing Bitcoin Core to sync normally.
Thanks but it isn't starting on the HDD 500 GB , I think because that partition has an EXT4 filesystem as Linux is installed in it.
H is the partition where Linux is installed, I access it from windows but when I double click on the setup of Bitcoin core it shows the above error. The only option for me is to buy a new hdd only for Bitcoin core.