WD My Passport not recognized...I deleted files

Hi…I am an experienced computer user…new here…but in the process of trying to increase space on a 500 GB My Passsport I think I deleted system files as it’s not recognized when I click on the drive.

Is there a place or files I can download to get it working again…when I click on properties it says there’s disk space available

but it shows the disk all used up.  Can somehow advise me please…and thanks.

Marc

There’s no such thing as system files

the drive will work with no folders inside

if you want to download the software that comes with the drive you can get it from the link bellow 

http://wdc.custhelp.com/app/answers/detail/a_id/5419/session/L3RpbWUvMTM0MDM3MjI1Ny9zaWQvdnBpOVNpX2s%3D